国产淫语对白丨一级高清免费毛片丨a免费在线观看丨三级三级久久三级久久18丨2019精品国自产拍在线不卡丨四虎影库永久地址丨www国产成人免费观看视频丨日韩欧美中文丨影音先锋中文字幕无码丨人妻激情文学丨黄色免费观看网站丨免费观看性生交大片女神丨久久婷婷五月综合尤物色国产丨www.色天使丨亚洲精品色无码av试看丨欧美日韩久久婷婷丨精品视频在线看丨丰满蕾丝乳罩少妇呻吟91丨伊人色综合久久天天丨亚洲成人一区二区三区

J41F-5 Brass Bellows Flange Globe Valve product Structure Features:
GB bellows globe valve for nominal pressure PN1.6-4.0MPa, operating temperature -20 ℃ -350 ℃ petroleum, chemical, pharmaceutical, fertilizer, power industry and other conditions of the pipeline, cut off or Turn on the line media. 
1, the product structure is reasonable, reliable sealing, excellent performance, handsome in appearance; 
2, sealing surface surfacing Co cemented carbide, wear resistance, corrosion resistance, abrasion resistance, long service life; 
3, valve stem quenching and surface nitrogen treatment, has good corrosion and abrasion resistance.; 
4, double sealing performance is more reliable; 
5, more intuitive stem down position indication; 
6, part material, flange and butt size according to the actual working conditions or user Requires reasonable matching, to meet the needs of various projects.

J41F-5 Brass Bellows Flange Globe Valve main dimensions