The third problem is that the drainage system pump house, pressure relief valve discharge water should be discharged into the fire pool, or sewer and should not be ranked in a narrow ditch Ming.

第三個(gè)問題是在线无码AV网站每日更新，水泵房的排水系統(tǒng)，泄壓閥排出的水應(yīng)排入消防水池或下水道日韩免费精品视频，不應(yīng)排在狹小的明溝里欧洲美女操逼视。

In agricultural production, pump irrigation and drainage are the main machinery.

在農(nóng)業(yè)生產(chǎn)中，泵是主要的排灌機(jī)械国产黄色视频99视频。

In this paper, the composition and control principle of the automation control system of main drainage pump used in coal mine are introduced.

介紹了一種礦井中央泵房主排水自動(dòng)化控制系統(tǒng)的組成和控制原理欧美丰满熟妇XXXX性多毛。

Permanent pump is famous large-scale water supply and drainage equipment, chemical pump series of professional manufacturers.

隔膜泵。管道泵永久泵業(yè)是國內(nèi)知名的大型給排水設(shè)備日本一本区免费中文高清，化工泵系列的專業(yè)制造商黄色视频一区二区免费。

A single pump drainage may produce flow backward when the check valve should be set up.

單臺(tái)水泵排水有可能產(chǎn)生倒灌時(shí)，應(yīng)設(shè)止回閥久久黄色视频免费看。

drainage pump：排水泵

drainage proposal 排水系統(tǒng)建議書 | drainage pump 排水泵 | drainage reserve 渠務(wù)保留地;渠務(wù)專用范圍

drainage pump：疏水泵

手壓提升泵 hand lift pump | 疏水泵 drainage pump | 輸油管線泵;管線泵 oil line pump

drainage pump：排泄泵

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drainage pump：艙底水泵

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mine drainage pump：礦井排水泵

礦井工作面泵; coal facepump | 礦井排水泵; mine drainage pump | 礦井筒袋泵; pit barrel pump