reversible level 回转水平仪 ; 可逆水平仪
reversible level tube 可倒水准管
ball magnetic reversible level meter 球式磁翻转液位计
reversible spirit level 回转水准仪
Column Magnetic Reversible Level Meter 磁翻柱液位计
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USS protocol used for communication between PLC and inverter can compensate for the lack of hardware interface converter and could realize multi-level reversible speed.
利用USS协议实现PLC与变频器之间的通信可以弥补变频器硬件接口的不足，能够实现多级正反转调速。
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