无码一区二区三区AV免费蜜桃-HD老熟女BBXXX丫-国产精品乱码久久久久久软件-少妇乱人伦无码视频

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