back-siphonagepreventer,anti-siphonagedevice,backflowpreventer詞語:back-siphonagepreventer,anti-siphonagedevice,backflowpreventer解釋:背部-虹吸能力防護器、抗虹吸能力設備、迴流防止器詞典:專利專業英漢詞典b......