When the control valve when the reverse, so that both fluid along the direction of movement of spool when closed, the flow control valve capacity will be increased.
当调节阀反向使用时，既流体沿着使阀芯关闭的方向流动时，调节阀的流通能力会增大。
2
The acknowledgement information relating to the flow of message in one direction is embedded (piggybacked) into normal data-carrying message flowing in the reverse direction.
与一个方向的报文流有关的确认信息钳在反方向正常携带数据的报文流中。
3
The acknowledgement information relating to the flow of message in one direction is embedded( piggybacked) into normal data-carrying message flowing in the reverse direction.