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US4523430A Fluid flow control system 失效
流体流量控制系统

Fluid flow control system
摘要:
A fluid flow control system has a capability of operating selectively in a power matching mode, in which power consumption is low, and a maximum flow mode in which high responsivity and high speed features can be appreciated. For this purpose, a mode selector valve is used to switch the system between these two modes.
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