单项选择题
A.6 inches in diameter and 19 fathoms long B.6 inches in circumference with 19 strands C.6 strands with 19 wires in each strand D.19 strands with 6 wires in each strand
A 6x12，two-inch wire rope has（）.A.12 strands and a two-...
单项选择题A 6x12，two-inch wire rope has（）.
A.12 strands and a two-inch diameter B.12 strands and a two-inch circumference C.6 strands and a two-inch diameter D.6 strands and a two-inch circumference
A “sheepshank” is used to（）.A.keep a line from frayingB...
单项选择题A “sheepshank” is used to（）.
A.keep a line from fraying B.join lines of unequal size C.stop off a line D.shorten a line
（）provide athwartship support for the mast or king post...
单项选择题（）provide athwartship support for the mast or king posts.
A.Shrouds B.King posts C.Stays D.Turnbuckles
