單項(xiàng)選擇題To prevent the riser system from buckling under its own weight,upward tension is provided by the().

A.riser stabilizers
B.guideline tensioning system
C.riser tensioning system
D.guideline stabilizers


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2.單項(xiàng)選擇題These weights are()the ship’s discharging facilities.

A.out
B.beyond
C.from
D.off

3.單項(xiàng)選擇題The valve on the discharge side of a cargo pump on a tanker will usually be a().

A.butterfly valve
B.spectacle valve
C.check valve
D.globe valve

4.單項(xiàng)選擇題The tricing pendants should be released().

A.before the gripes are removed
B.before loading the passengers
C.after loading the passengers
D.after the boat is afloat