push-pull

adj (of electrical equipment) containingtwo valves, etc operated alternately by alternating current（指电气设备）推挽式的: a push-pull amplifier 推挽放大器.

purse, purser, pursuance, pursuant, pursue, pursuer, pursuit, purulence, purulent, purvey, purveyance, purveyor, purview, pus, push, push-bike, push-button, push-cart, push-chair, push-over, push-start, push-up, pusher, pushily, pushiness, pushing, pushover, pushy, pusillanimity, pusillanimous, pusillanimously, puss, pussy, pussy willow, pussyfoot, pustule, put, put (sth) down, put a check on, put across,