单项选择题
A tool consisting of a handle and releasable chain used for turning pipe or fittings of a diameter larger than that which a pipe wrench would fit is called（）.
A.breakout wrench B.makeup tongs C.chain tongs D.pipe spinner
单项选择题 A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.
单项选择题 A spring line is a（）.
单项选择题 A six-strand composite rope made up of alternate fiber and wire strands around a fiber core is called（）.
