As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.<br>A:advance<br>B:cavitation<br>C:edging<br>D:slip

As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
A:advance
B:cavitation
C:edging
D:slip

出自：海船船员证

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