A.Oil vapour in air piping are dangerous
B.Explosion will cause oil vapouring in air lines
C.Oil vapour in air piping should be drained
D.Oil in air piping should not be drained
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A.The marine bellows joints are attached in the accommodation only
B.The bellows joints should be attached to anchors
C.The associated piping should be thrown into the water like as anchors
D.The connecting piping with the joints should be fixed firmly
A.maximum working temperature
B.minimum working temperature
C.the joint
D.the insulating material
A.stainless steel
B.temperature
C.50℃
D.other materials
A.flanges
B.nuts
C.expansion joints
D.bolts
A.east iron firings
B.mild steel fittings
C.small fittings
D.large fittings
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