| 摘要 |
<p>Pump A handoperated water pump comprising a pump body, a piston, ahandle at the upper end of the piston, avalve system connected to the pump body and comprising an inlet and an outlet, wherein the lower end of the piston is provided with a plateand an adjustable tensioner, to tension a piston seal located between the plateand the adjustable tensioner and wherein the adjustable tensioner comprises a spring.</p> |
