cylinder / pipe / tube / gun barrel / sleeve

tube / hub (central part of a wheel)

hub (central part of a wheel)

pistol; gun

a surname

(mahjong) dot tile

(mahjong, archaic) dot tile

pump (device for moving liquid or gas)

湯桶: A lacquerware container with a spout for holding broth or tea for consumption after a meal; a type of tea caddy shaped like a pail.