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單項選擇題
A series of trays with sieves that vibrate to remove cuttings from the circulating fluid in rotary drilling operations is called the().
A.shale shaker
B.settling pit
C.desilter
D.desander
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A semisubmersible with a positive GM,and TCG located starboard of the centerline,inclines to an angle of().
A.heel
B.trim
C.list
D.loll
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單項選擇題
A semisubmersible with a negative GM flops to an angle of().
A.heel
B.trim
C.list
D.loll
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