以下为句子列表：
英文: It is mainly used as cut-off valve and also can be designed as regulating or cut-off / regulating combined valve. currently , butterfly is mainly used in the low pressure large size pipelines.
中文: 在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则牌全开状态。
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英文: The main products of YUfeng include home oxygen supply serries,Oxygen inhaler series.absorbing bottle series.cut-off valve serles.pipe onnectors series.Oxygen valves eseries,fivst-aid & medical kit series,ect.
中文: 公司主要产品现在有家庭用供养器系列，氧气吸入器系列，吸引瓶系列，截止阀系列，管路用管接头系列，氧气阀门系列，急救阀门系列，急救保健箱系列等。产品销玩全国三十个省，市，自治区，深受广大客户的信赖和支持。
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英文: The principle, structure and performance of an extrahigh pressurebig-flow polot cut-off valve which is proof anainst wastage media are introduced.
中文: 介绍了一种新开发的超高压、大流量、适应污水介质的先导式截止阀的原理、结构和性能特点。
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