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單項選擇題

The load chart of a ship crane enables the operator to combine the load radius with boom length to determine the（）.

A.maximum counter weight required
B.minimum horsepower required
C.hoist rope strength
D.allowable load

單項選擇題

The boom indicator tells the operator at what angle the boom is compared to the（）.

A.horizontal position of the boom
B.vertical position of the boom
C.horizontal position of the load being lifted
D.vertical position of the load being lifted