单选题When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.Awinch speedBboom strengthCload radiusDcable strength
单选题
When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.
A
winch speed
B
boom strength
C
load radius
D
cable strength
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