Compared with the prior art, the invention replaces the existing manual operation and mechanical direct pressing dewatering by the principle of dewatering by negative pressure.
本发明与现有技术相比，由于采用负压脱水的原理，取代了现有的手工操作以及机械式的直接压制脱水。
The utility model provides a manual pipe dredger which can produce larger negative pressure, so as to improve dredging capability.
本实用新型是提供一种能产生较大负压从而大大提高疏通能力的手动疏管器。
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