可是我并没有立刻反应过来那是您，因为在那部大车方向盘后面的驾车人显得那么苍老、虚弱。
It didn't immediately occur to me that it was you because the man driving looked so elderly and fragile behind the wheel of that huge car.
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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