وصف قصير:

Model： TB-B1 Structure： The valve seat is inlaid with engineering plastics plug-in by metal base, and is finished after assembling to form a sealing pair with the sphere. The plug-in is made of thermoplastic plastics and is pressed into the base by a hydraulic press to achieve tight fit. Characteristic： Tengbo base groove has a unique pre-tightening and anti-stripping design, so that the plug-in is locked in the groove, not blown out. By eliminating internal and external rolling and...