They are the pressure sealvalve, the packed valve, and the diaphragm valve.
它们是压力密封阀、衬垫阀和隔膜阀。
2
3 completely changed the metal sealvalve easy to leak, torque, sealing surface corrosion of the shortcomings of impatience.
?3。彻底改变了金属硬密封球阀易泄露、扭矩大、密封面不耐腐蚀的缺点。
3
A mechanical seal and water seal combined floor drain consists of a floor drain cover, a main floor drain body, a float and a hose type magnetic sealvalve.