分流电子管
分流阀
分水阀
分水龙头
旁路管

Shunt valve \Shunt valve\ (Mach.)
A valve permitting a fluid under pressure an easier avenue of
escape than normally; specif., a valve, actuated by the
governor, used in one system of marine-engine governing to
connect both ends of the low-pressure cylinder as a
supplementary control.
[Webster 1913 Suppl.]