Mechanical seal: this type is especially suitable for multi-stage slurry pump in series and without leakage.
机械密封：该形式的密封特别适用于多级串联渣浆泵的密封，完全无泄漏。
The research of this series of pump is successful.
该系列射流式自吸离心泵的研究是成功的。
Roots pump is the main pump to pump for the former spin-pump series from.
是以罗茨泵为主泵，以旋片泵为前级泵串联而成。
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