大肥屁股白浆一区二区_都市校园春色激情国产_久久伊人亚洲精品_欧美黄色网站观看互动交流_亚洲av一级夜夜_无码h黄肉3d动漫在线观看_日本三级综合色啪_靠比久2021年精品国产福利在线_国产乱伦精品一区_日本在线看片

Z41X Rising stem soft seal gate valve produced and sold by Baigang valve group addition to the advantages of the elastic seat gate valve, and can be more intuitive display valve opening, opening and closing quickly and reliably, it is often used in fire and industrial systems. Generally installed at a higher position from the ground. I plant the introduction of European high-tech valve manufacturing technology produced by the seat block valve, the use of the whole door plastic deformation generated deformation effect to achieve a good sealing effect, to overcome the poor general valve seal, leakage and rust phenomenon. It can be widely used as a regulating and intercepting device in fluid lines such as tap water, sewage, construction, petroleum, chemical, food, medicine, light injury, electric power, shipping, metallurgy and energy system.