Mousing a cargo hook with marline or small line（）.
- Aincreases the lifting capacity of the hook
- Bprotects the hook from the sling ring
- Cprevents the sling ring from coming out of the hook
- DAll of the above
问题
Mousing a cargo hook with marline or s
参考解析：
分类：货物单元系固与CSC规则题库
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