上海正封阀门有限公司

nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微软雅黑, Arial; font-size: xx-small; white-space: normal; background-color: rgb(255, 255, 255);">nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; color: rgb(0, 0, 0);">H44H旋启式止回阀nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; font-size: larger;">nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; color: rgb(0, 0, 0);">是能自动阻止流体倒流的阀门。止回阀的阀瓣在流体压力作用下开启，流体从进口侧流向出口侧。当进口侧压力低于出口侧时，阀瓣在流体压差、本身重力等因素作用下自动关闭以防止流体倒流。 
nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px;">nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; font-size: larger;">nclick="null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return" function*="" override="" *finally="arguments.callee;" removechild?）;var="" removechild="function MyRC（arg1）{var self = this;if （self.removeAttribute）self.removeAttribute（" result="self[" restore="" the="" removechild?]（arg1）;self[?removechild?]?="" style="margin: 0px; padding: 0px; color: rgb(0, 0, 0);">H44H型旋启式止回阀启闭用。