0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the().
A.vertical position
B.horizontal position
C.boom stop angle
D.minimum radius angle
参考答案:B
0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the().
A.vertical position
B.horizontal position
C.boom stop angle
D.minimum radius angle
参考答案:B