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SAE
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SAE Grade
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Safeguard (Reliability)
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Safety Relief Valve (SRV)
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Safety Stock
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Safety Valve
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Safety-Instrumented Function (SIF)
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Safety-Instrumented System (SIS)
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Sampling Rate (Dynamic Signal Analysis)
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Sand Casting
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Sand-Molded Casting
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Saturated Steam
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Saybolt Seconds Universal/ Saybolt Universal Seconds (SSU/SUS)
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SCADA
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SCC
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SCFM
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Schedule (Pipe)
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Scheduled Discard
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Scheduled Downtime
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Scheduled Maintenance
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Scheduled Restoration
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Screw (Extruder)
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Screw Compressor
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Screw Pump
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Seal
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Seal Chamber
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Seal Face
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Seal Flush Plan
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Seal Life
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Seal Pot
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Sealless Pump
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Seismic
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Seismic Transducer
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Self-Aligning (Bearing)
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Self-Aligning (Mechanical Seal)
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Semi-Open Impeller
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Semiconductor
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Separable Reciprocating Compressor
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Separator
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Series
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Series Operation
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Service Factor (SF) (Electric Motor)
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Servicing
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Set Screw
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Setpoint
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Settle-Out Conditions (Centrifugal Compressor Design Term)
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Severity
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SF
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Shaft
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Shaft Geometric Centerline
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Shaft Packing
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Shaft Seal
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Shaft Sleeve
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Shear Strength
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Sheave
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Shelf Life
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Shellac
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Shim
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Shock Wave (Gas Dynamics)
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Shoe (Piping)
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Shore “A”
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Short Circuit
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Shoulder Fillet (Shaft)
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Shoulder Radius
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Shrink Fit
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Shroud
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Shut-Off Head (Centrifugal Pump)
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Shutdown
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Shutdown Maintenance
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SI
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SiC
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Side Stream (Flow Configuration)
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SIF
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Sight Glass
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Signal-To-Noise Ratio (SNR)
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Signature
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Silencer
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Silicon Carbide (SiC)
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Simple Cycle Gas Power Plant
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Single Crystal Blade
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Single Minute Exchange Of Dies (SMED)
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Single-Acting
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Single-Acting Cylinder
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Single-Acting Cylinder (Compressor)
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Single-Phase Power
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Single-Plane Balancing
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Single-Shaft Gas Turbine
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Sintered Material
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SIS
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Skid (Machinery)
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Skim Cut
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Sleeve Bearing
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Slenderness Ratio
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Slide Loading Valve
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Slide Plate
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Slide Valve (Bulk Solids)
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Slide Valve (Screw Compressor)
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Sliding Fit
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Slinger Oil Disc
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Slip Fit
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Slip Stick
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Slow Roll Speed
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Sludge
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Slug Catcher
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Slugging (Steam Turbine)
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Slurry
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Slurry Pump
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Small Bore Piping
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SMED
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Smoke
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SNR
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Society Of Automotive Engineers (SAE)
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Society Of Petroleum Engineers (SPE)
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Society Of Tribologists And Lubrication Engineers (STLE)
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Socket Weld (Piping)
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Soft Foot
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Soft Start
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Solenoid
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Soluble
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Soot
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SOP
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Sour Gas
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Space Heater
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Spacer Sleeve
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Span
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Spare Assemblies
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Spare Part
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Spark Ignition
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Spark Plug
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SPC
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SPE
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Special Purpose Steam Turbine
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Specific Gravity
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Specific Gravity (Gases)
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Specific Heat
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Specific Speed (N
s
)
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Specific Volume
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Spectral Alarm Band
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Spectral Map
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Spectrographic Oil Analysis
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Spectrum (Vibration)
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Spectrum Analyzer
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Speed
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Speed Of Sound
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Spillback
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Spin Casting (Babbitt)
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Spiral Teeth
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Splash Lubrication
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Spline Fit
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Split Casing
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Split Line
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Splitter
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Spool Piece
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Spring
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Spring Compression
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Spring Force
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Sprocket
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Spur Gear
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SRV
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SSU
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Stability (Control Theory)
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Stagnation Pressure
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Stainless Steel
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Staking
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Standard Cubic Feet Per Minute (SCFM)
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Standard Operating Procedure (SOP)
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Standby Redundancy
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Star Connection
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Star Delta Configuration
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Starvation (Hydraulics)
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Static Data
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Static Head
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Static O-Ring Groove
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Static Pressure
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Static Pressure Head
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Stationary Seal
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Statistical Process Control (SPC)
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Stator
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Steady-State Condition
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Steady-State Failure Rate
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Steam Drum
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Steam Quality
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Steam Rate (Steam Turbine)
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Steam Turbine
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Steam Turbine Governor
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Steam Turbine Seal
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Stefan-Boltzmann Law
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Stem (Valve)
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Step
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Stiffness
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Stiffness Ratio
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STLE
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Stock (Pulp And Paper)
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Stockout
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Stoichiometric Combustion
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Stonewall
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Storage Life
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Straight Edge (Machinist Tool)
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Straight Through (Flow Configuration)
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Strain
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Strainer
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Streamline
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Stress
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Stress Analysis
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Stress Concentration
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Stress Corrosion Cracking (SCC)
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Stress Relieve
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Stress Relieving
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Stress Riser
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Stress-Strength Interference
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Strobe Light
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Stroke
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Stub Resonance
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Stuffing Box (Mechanical Seal)
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Stuffing Box (Packing)
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Stuffing Box Pressure
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Subharmonic
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Submergence
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Substrate
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Subsynchronous
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Subsystem
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Suction (Compressor)
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Suction (Gas Flow)
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Suction Bell
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Suction Head
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Suction Nozzle
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Suction Recirculation (Off-Design Operation)
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Suction Recirculation (Seal Flush)
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Suction Scrubber (Compressor)
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Suction Valve Unloader
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Suction-Specific Speed
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Sulfidation
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Sump
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Sump Pump
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Sums And Difference Frequencies (Vibration Analysis)
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Supercharger
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Supercharging
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Supercritical Flow (Gas Dynamics)
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Superheat
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Supersonic Flow (Gas Dynamics)
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Supervisory Control And Data Acquisition (SCADA)
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Surface Hardening
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Surface Speed
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Surge
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Surge Control
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Surge Line
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Surge Margin
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Surge Point
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SUS
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Sweet Gas
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Swept Volume
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Swing Check Valve
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Swirl
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Switch Gear
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Sympathetic Failure
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Symptom
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Synchronous Averaging
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Synchronous Motor
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Synchronous Sampling (Dynamic Signal Analyzer)
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Synchronous Speed
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Synthetic Oil
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System
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System Curve
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System Head
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System Stability (Controls)
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