你可能感興趣的試題

單項(xiàng)選擇題

Safety shackles are fitted with（）.

A.a threaded bolt
B.a round pin，with a cotter pin
C.a threaded bolt，locknuts，and cotter pins
D.round pins and locknuts

單項(xiàng)選擇題

Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.

A.kept on board no more than 2 years
B.inspected and serviced every 6 months
C.destroyed if more than 5 years old
D.maintained in good and serviceable condition