roll onroll-off vessel
滚动装船跳板 tailgate ramp
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缺乏港口屏蔽的海浪环境中重荷载进行滚动卸载时，必须考虑波浪对船的作用和重荷载与船的相互作用。
When unloading heavy roll-on loads in sea wave con-dition lack of harbor shielding, it is necessary to consider the effect of sea waves on the ships and mutual effects between the ships and the loads.
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模块下移
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