A spreader bar is used to（）.<br>A:increase the lifting capacity<br>B:increase the lifting radius<br>C:protect the slings<br>D:protect the upper part of a load

A spreader bar is used to（）.
A:increase the lifting capacity
B:increase the lifting radius
C:protect the slings
D:protect the upper part of a load

出自：海船船员证

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