例句與造句

1. Xh rubber slowly - closing cut - off vavle is a new water supply and drainage vavle with full rubber structure , duck - mouthed appearance and functions or positive flow - in and reserve cut - off . according to thrust analysis and calculation as well as different operation mechanism and different rubber products by special processing . all will be open at weak hydraulic pressure is higher , the vavle gate will open more greatly and the water flow is greater . at reserve operation , the vavle gate closes naturally and seals tightly cut - off vavle ; the back pressure is higher , the vavle gate closes more tightly and the seal effect is better . it is used widely in various drainage exit to prevent from pouring backwards and flowing backwards in city planning , water conservancy and sewage disposal etc . it is the ideal productto replace flap vavle
   Xf型橡膠緩閉逆止閥是一種全橡膠結(jié)構(gòu)外形呈“鴨嘴狀” ，具有“正向流入反向逆止”功能的新型給排水閥門(mén)產(chǎn)品。它根據(jù)受力分析和受力計(jì)算，針對(duì)不同的工況，采用不同的設(shè)計(jì)機(jī)理，選用不同的橡膠配方，并按特殊工藝制作而成。正向工作時(shí)，水由進(jìn)水口流入，微小的水壓，便能打開(kāi)閥門(mén)，水壓越大，閥門(mén)開(kāi)啟越大，水流量越大。
2. It's difficult to find drainage exit in a sentence. 用drainage exit造句挺難的