6.Flashing is metal stripping that is nailed around the perimeters of these holes, then sealed or caulked , to prevent water leakage.
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Flashing is metal stripping that is nailed around the perimeters of these holes, then sealed or caulked, to prevent water leakage.
闪光的金属剥离就是钉周围这些小孔，然后密封或房顶，为防止漏水。
Submersible pump to prevent water leakage caused an electric shock when working accidents leakage protection switch should be instal led.
为防止潜水泵在水下 工作时漏电而引发触电事故，应装漏电保护 开关。
The workers are unblocking the sewer to prevent the leakage of dirty water.
工人们正在疏通下水管道，防止脏水外泄。
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