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用抓斗的普通门式起重机工作级别较高。
With a grab of ordinary high-level gantry crane.
youdao
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QB型防爆吊钩桥式起重机工作级别为中级。
QB type explosion-proof hook bridge crane work level is intermediate.
youdao
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QB型防爆吊钩桥式起重机工作级别为中级。
QB type explosion-proof hook bridge crane work level is intermediate.
youdao