overhead crane with slewing crab
带回转小车的桥式起重机
Designing main girder, end carriage and crab of crane. 3.
设计起重机主梁，端梁和小车。
So the crane permitted the crab to grab onto his neck with all eight legs.
因此鹤答应了让螃蟹用八只脚抓住它的脖子。
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