所述主臂的头部的滑轮组还可 以是组合式滑轮组。
The pulley block on the head of the main arm can be a combined type pulley block.
艏摇的存在会明显的衰减尾柄主臂和尾鳍攻角的角位移。
The yawing can apparently attenuate the angular displacement of both the tail and the attack angle of tail fin.
结论吊重起升加速度对起重机动载荷的影响较大，特别对主臂内的动弯矩的激励更加明显。
The influence of load hoisting acceleration on dynamic forces is obvious, especially on dynamic bending moment of the main boom.
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