"用泵吸入" can be translated as "to draw in by a pump" or more commonly and concisely as "to pump in" (when referring to the action of suctioning or drawing a fluid in using a pump).
For example:
We need to pump in the water using the pump.（我们需要用泵把水吸进来。）
The liquid is drawn in by the pump.（液体被泵吸入。）