·物位开关(Level Switches) ·接近开关(Proximity Switches)
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... 液位传感器 level sensors 液位开关 level switches 气动阀门执行器 pneumatic valve actuators ...
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... Level Indicators液位指示 Level Switches物位开关 Conductivity电导率 ...
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Optical Level Switches 水平光控开关
liquid level switches 液位开关
level controllers and switches 液位调节器及液位开关
To enable a given automatic maintenance feature, the corresponding configuration parameter and all higher level switches must be set to ON.
若要启用某个指定的自动维护特性,必须将相应的配置参数和所有较高级别的开启特性设定为 ON。
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If you happen to come back into a 4G area (signal level above the 3G value), it switches modes again taking another 30 seconds to establish an active link.
FORBES: The Limits of 4G Connectivity
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