液位控制

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    electronic-dual-level-switch-bls2000.jpg

    液位開關

    BLS2000 Dual Level Switch
    Electronic Dual Level Switch
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    dual-level-switch-electronic-bls3000.png

    液位開關

    Electronic Dual Level Switches
    Model BLS3000

    Dual Level Switch, Pressure Transducer, and Digital Level Gauge