而且安静无声
And it is quiet and silent.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
主机内帮浦为本公司长时间研究及开发，可长时间连续运转，安静无声而且不会因长时间运转而致轴心磨损而致漏水。
The pump in center unit has been also in long time research, designed for long-lasting function, quiet and won't cause leak due to axle damaged.
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