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Material inspection Weight,Density,MFR,Tensile strength, etc.
Parts inspection Appearance,Dimension,Voids,Strength, etc.
Machining inspection Appearance,Dimension, etc.
Assembling & Fusion
inspection
appearance,Dimension, etc
Production test Leakage test(Seat/Shell), Operating, Fusion bead, Dimension
Packing inspection Appearance, Marking, Others
Qualification test Operating torque test, Temperature resistance test, Sustained pressure test,
Short term burst test, Bending test