This pneumaticrelay provides high output flow at an output pressure that represents the input signal pressure plus a preset bias.
这种气动继电器输出提供了压力，表示输入信号压力加上预设的偏见高输出流量。
2
Fairchild's Model 21 is an adjustable ratio PneumaticRelay, whereby the ratio of output pressure to signal pressure is infinitely adjustable.
飞兆半导体的21型是一种可调比气动继电器，即输出的压力信号的压力比是无限可调。
3
The Model 21 Adjustable Ratio pneumaticrelay has a signal chamber lever arm, whereby the ratio of output pressure to signal pressure is infinitely adjustable.