PLC系统采用SIEMENS公司产品，能控制起重机大车、小车的运行方向和速度换档；
PLC system adopts the SIEMENS Company products, can control the crane cart , car operation direction and change speed ;
PLC系统采用SIEMENS公司产品，能控制起重机大车、小车的运行方向和速度换档；
PLC system adopts the SIEMENS Company products, can control the crane cart , car operation direction and change speed ;
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