drain without bottom valve
drain without bottom valve
无底阀排污
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The pump has simple structure and is convenient in maintenance, which can drain without bottom valve and achieve the goal of high-efficiency and energy saving.
该泵结构简单、维护方便，可实现无底阀排水，达到高效节能的目的。
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