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kbojezhang44

Effects of the fundamental elements of mechanical seals - 1 views

The conflicting vice should ensure a close fit and form a sealing surface to avoid medium leakage. This requires that the pump mechanical seal conflict must have outstanding abrasion resistance; th...

Business

started by kbojezhang44 on 01 Apr 20 no follow-up yet
kbojezhang44

What are the functions of the breathing exercise machine - 1 views

The human body suffers from lung damage due to surgery or disease, which affects normal breathing. Therefore, it is necessary to restore the normal physiological function of the lung as much as pos...

business

started by kbojezhang44 on 26 Oct 20 no follow-up yet
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