External flow switch inhibits pump output when no sample flow is available.

在没有可用的样本时，外部流量开关将会抑制泵输出流量。

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Start the bilge water feed pump, check the feed water solenoid valve and flow switch.

启动舱底水供给泵，检查补水电磁阀和流量开关是否工作。

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Mount flow switch in position so that the paddle assembly is at a right Angle to the flow.

安装流量开关定位要正确，要使得开关叶片总成与水流形成直角。

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All power wasn't lost, because a second switch remained active, allowing some electricity to flow over an alternate route.

WSJ: Device Setting Triggered Super Bowl Outage

That led the relay, a kind of sensing device, to incorrectly conclude there was an electrical problem and tell a nearby electrical switch to isolate the perceived problem, reducing the flow of power to the Superdome during the game's third quarter.

WSJ: Device Setting Triggered Super Bowl Outage

Reality extends to the plain fact that there is no switch or level to push, pull or toggle that will instantaneously change the polarity of the flow.

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