题目内容
(请给出正确答案)
[单选题]
履带式起重机起重吊装作业中,采用双机抬吊作业时,单机的起吊载荷不得超过额定载荷的()
A.50%
B.60%
C.70%
D.80%
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A.50%
B.60%
C.70%
D.80%
A.75%
B.80%
C.85%
D.90%
A.60%,75%
B.60%.80%
C.75%,60%
D.75%,80%
A.60%
B.70%
C.80%
D.90%
A.1.0
B.0.9
C.0.8
D.0.7
A、0.60
B、0.70
C、0.80
D、0.90