bypass flow meaning in English

旁通流
外函气流

Test methods for electro - hydraulic proportional bypass flow control valves
电动液压比例旁通流量控制阀试验方法
Bypass flow regulator
旁通流量调节阀
Test methods for electro - hydraulic proportional directional bypass flow control valves
电动液压比例定向旁通流量控制阀试验方法
The effect of bypass flow upon gas - liquid two phase flow characteristics in the shell - side of a shell and tube heat exchanger
旁路流对换热器壳侧气液两相流动特性的影响