1、
2、
Bulky materials will be lifted by mobile crane from roof level to ground level.
大件物料将由吊机从天台吊运到地面。
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3、
The influence of crane load to the internal force of bottom chord bar of trapezoid steel roof truss
水动力荷载；吊车荷载对梯形钢屋架下弦杆内力的影响
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4、
crane on the roof of their car and knowle rohrer in pursuit.
道格特和斯金纳在汽车里,克雷恩探员在他们的车顶上,诺勒罗赫在追赶.
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