单选题Fittings used for towing must be（）.ACoast Guard approvedBstamped with maximum working loadsCsecurely fastenedDpositioned exactly at the bow of the towed vessel
单选题
Fittings used for towing must be（）.
A
Coast Guard approved
B
stamped with maximum working loads
C
securely fastened
D
positioned exactly at the bow of the towed vessel
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