单项选择题

A bench hook is used for（）.

A.handling of cargo cases
B.hanging oilskins
C.sewing canvas
D.splicing small stuff

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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

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