单选题Safety shackles are fitted with（）.Aa threaded boltBa round pin，with a cotter pinCa threaded bolt，locknuts，and cotter pinsDround pins and locknuts
单选题
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
参考解析
解析：
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