影音先锋色69成人资源_欧美性视频在线观看69_香蕉久久夜色精品国产2024_欧美激情一区二区成人_熟女无套高潮内谢吼叫免费_狠狠色丁香婷婷综合橹不卡_办公室的交易日本电影_全彩3d啪啪无码本子全彩_韩国午夜理论在线观看_国产精品亚洲无码日韩

Heavy duty shut-off valve2

The product is designed and manufactured in accordance with the American National Standard ANS B16.34, American Petroleum Institute standard API 6D and API 600 requirements. The product has compact structure, good rigidity and excellent sealing performance. It is the most widely used and most commonly used valve in pipeline valves. one.

Online
Online