精品国产一区二区三区四区阿崩-曰韩精品无码一区二区视频-天天狠天天天天透在线-欧美性插b在线视频网站-高潮流白浆潮喷在线播放视频

Z45X NRS resilient seat gate valve, the use of the gate integral plastic deformation compensation to achieve a good sealing effect, overcome the general poor seal gate valve, leakage and rust phenomenon, more effectively save installation space.It can be widely used as regulator and closure device in the fluid pipeline of tap water, sewage, construction, petroleum, chemical industry, food, medicine, light textile, electric power, ship, metallurgy, energy system, etc.