【单选题】当车漆发生剥落时,需要检查伤到的什么面?
【单选题】更换电池之前,先接通可编程序控制器的交流电源约 ( )S ,为存储器备用电源的 电容器充电(电池断开后,该电容器对存储器做短暂供电)。
【多选题】关于液压马达的说法中,正确的有( )。
A.
液压马达是将液体压力能转换为旋转机械能的装置
C.
由于液压马达与液压泵原理相同,因此二者结构也完全相同
【单选题】Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?
B.
Temperature of the liquid seal
【单选题】In the oil purifier, the interface move outside the top disc, the oil will escape through______.
C.
the observe glass passage
【单选题】In the oil purifier, the interface move outside the top disc, the oil will escape through______
A.
the observe glass passage
【多选题】下列有关液压马达论述中正确的有( )。
A.
液压马达是将液体压力能转换为旋转机械能的装置
C.
由于液压马达与液压泵原理相同,因此二者结构也完全相同
【单选题】更换电池之前,先接通可编程序控制器的交流电源约( )s,为存储器备用电源的电容器充电(电池断开后,该电容器对存储器做短时供电)。
【单选题】更换电池之前,先接通可编程序控制器的交流电源约 ( )S ,为存储器备用电源的 电容器充电(电池断开后,该电容器对存储器做短暂供电)。
【单选题】In a disk-type lubricating oil purifier, _______.
A.
the purifier driving gears are lubricated by the reclaimed
B.
oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water
C.
sealing water must never be supplied until after oil is fed to the unit
D.
deterioration of the bowl ring gasket will cause the purifier to lose its water seal