你可能感興趣的試題

A spark arrestor（）.

A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity

單項(xiàng)選擇題

A relief valve for a cargo pump is generally installed（）.

A.after the discharge valve
B.between the pump and discharge valve
C.after the suction valve
D.between the pump and suction valve

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A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the（）.

你可能感興趣的試題

A spark arrestor（）.

A relief valve for a cargo pump is generally installed（）.

A vessel behaves as if all of its weight is acting downward through the center of gravity，and all its support is acting upward through the（）.