Finish the design of electricity control system of the gantry crane completely.
较完整的完成了龙门起重机电气控制系统的设计。
The German PAT computer-controlled system ensures safety for crane operation.
德国PAT计算机程序控制系统，保证起重机安全工作。
The German PAT computer-controlled system ensures safety for crane operation.
德国PAT计算机程序控制系统，保证起重机安全工作。
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