单项选择题
A.independent B.lang lay C.preformed D.spring lay
A permanent chain chasing system is used to（）.A.clean a...
单项选择题A permanent chain chasing system is used to（）.
A.clean anchor chain as it's hauled in B.recover anchors which have lost their buoys C.run and retrieve anchors D.prepare anchor chain for inspection
A pelican hook（）.A.can be released while under strainB....
单项选择题A pelican hook（）.
A.can be released while under strain B.is used for boat falls C.is used for extra heavy loads D.is used for light loads only
A long pole with a hook at one end，used to reach for li...
单项选择题A long pole with a hook at one end，used to reach for lines，is known as a（）.
A.pike pole B.jack staff C.line rod D.hooker
