| 摘要 |
The pump comprises a main hose (1) with an external profile without projections, where the hose has constant diameter. An airtight closing (2) with two connections (4,5) is provided in the upper end and an outlet is provided for entry and exit of air based on the aspiration or expulsion cycle. The connection has an anti-return valve (9) favoring, when the cycle is in the expulsion phase, the exit of the water that ascends by an interior hose. An anti-return system (3), a filter (8) and a protector (7) is located in the lower end of the hose, which is placed in the aspiration phase. |
