| 摘要 |
<p>An electromagnetic pump comprises at least two fluid passages both opening into a pump chamber and being openable and closable, respectively, by respective valves. Further, a plunger reciprocately movable inside said pump chamber and a solenoid for driving said plunger are provided, whereby at least one of said valves being coaxially positioned with said plunger with respect to the direction of reciprocating movement of said plunger. <IMAGE></p> |
