The net productivity per gang-hour can be improved through a decrease of（）.<br>A:cranes/derricks<br>B:crane/derrick cycles<br>C:crane/derrick cycle time<br>D:weight per package

The net productivity per gang-hour can be improved through a decrease of（）.
A:cranes/derricks
B:crane/derrick cycles
C:crane/derrick cycle time
D:weight per package

出自：海船船员证

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