Welded bonnet threaded gate valve, the valve designed in this way, body and bonnet are threaded and fully welded and sealed. Full penetration can also be used when the customer has special requirements.
R152a is a colorless gas under ordinary temperature, and a colorlesstransparent liquid under the pressure of itself, easily solube in oil but poorly in water. It is mainly used as the important raw material for refrigerants, aerosol propellants and synthe
T336 Micro-computer squash ball machine Design concept : Squash is an indoor sport, it can not be subject to seasonal weather restrictions, but also an all-weather sport.Squash is not only easy to learn, for non-professional athletes in terms of understan