截止閥具有結(jié)構(gòu)緊湊，密封面不易磨損、擦傷；密封性能好，制造與維修方便；啟閉時閥瓣行程小，啟閉時間短；閥門高度小，工藝性能好和適用范圍廣等特點；

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http://www.0577v.net/prod.asp?cid1=53  法蘭截止閥                                        
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http://www.8kty.com/content/?638.html  硬密封蝶閥                                        
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