Double mechanical seal, No leakage, Can bear higher working pressure.
采用双机械密封，安全无泄漏，可承受更高的工作压力。
Shaft seal is adapted, which can bear higher back pressure.
采用进口轴密封，能承受高背压。
An investment certificate shall bear the seal of the company.
出资证明书由公司盖章。
An investment certificate shall bear the seal of the company.
出资证明书由公司盖章。
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