drainage plug 中文意思是什麼
drainage plug
解釋
放泄塞-
Once a penetrating chink appears, it should firstly plug up at a vortex pot on the water side of the dyke, with auxiliary drainage added on the land side
貫穿性漏洞出現后,首先應找準漏斗,外堵為主,配以內導,搶險的重點應放在迎水面。
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