Хятад гидравлик тэлэлтийн зангуу үйлдвэрлэгч ба …
Water Swelling Friction Bolt is made by high strength welded tube folded itself and welded to seal at both end of bolt. Working principle: When the bolt is used in the hole, the bush with a hole is connected with a chuck of a high-pressure water pump. Start the pump and inject the water into tube...