The series of electric control devices developed in 70s for overhead travelling and gantry cranes has several shortcomings.
70年代我国统一设计的桥式、门式起重机系列电控设备存在不少缺点。
The series of electric control devices developed in 70s for overhead travelling and gantry cranes has several shortcomings.
70年代我国统一设计的桥式、门式起重机系列电控设备存在不少缺点。
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