positive and gate 中文意思是什麼
positive and gate
解釋
「與」門-
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構外形呈「鴨嘴狀」 ，具有「正向流入反向逆止」功能的新型給排水閥門產品。它根據受力分析和受力計算，針對不同的工況，採用不同的設計機理，選用不同的橡膠配方，並按特殊工藝製作而成。正向工作時，水由進水口流入，微小的水壓，便能打開閥門，水壓越大，閥門開啟越大，水流量越大。 -
In the 1820s, siam held peace talks with british messenger for three times. siam executed the flexible diplomatic tactics of apparently welcoming and refusing in fact which made the purpose of stationing the consul and founding the business hotel to open the siam ' s gate of national capital unrealized, and which avoided the big positive conflict with britain and guaranteed the independence of sovereignty and the completeness of territory
19世紀20年代，暹羅三次與英國來使舉行和談，施行欲拒還迎的靈活外交策略，使英國駐領事、設商館以打開暹羅國門的目的沒能實現，避免了與英國發生正面的大沖突，保證了主權獨立和領土完整。
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