A backlash below a lock is defined as a（）.<br>A:current setting your vessel on the wall<br>B:current setting into the lock chamber<br>C:an eddy working along the lower guide wall<br>D:current setting counterclockwise

A backlash below a lock is defined as a（）.
A:current setting your vessel on the wall
B:current setting into the lock chamber
C:an eddy working along the lower guide wall
D:current setting counterclockwise

出自：海船船员证

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