pump-action
adjective [ before noun ] uk/ˈpʌmp.æk.ʃən/ us/ˈpʌmp.æk.ʃən/
（装置）拉推式的，压出式的
used to refer to a device that operates by forcing something, especially air, in or out of a closed space or container
a pump-action shotgun 拉推式猎枪
a pump-action toilet 泵式抽水马桶