单项选择题
A.lower spring buoys into the water
B.find an anchor after the buoy has been lost
C.transfer a pennant wire to the anchor handling boat
D.clean chain as it is hauled into the rig
单项选择题 A set of interior steps on a ship leading up to a deck from below is know as（）.
单项选择题 A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.
单项选择题 A series of trays with sieves that vibrate to remove cuttings from the circulating fluid in rotary drilling operations is called the（）.