短語詞組短語bottom header pipe 閘門底部放水管;閘首底部放水管Header pipe tubes for PF -condenser 平行流冷凝器主管pipe header 管子聯箱;帶連接管的配水干管;聯管箱boiler pipe header 鍋爐集箱Heat exchange pipe header 換熱管聯箱 返回 header pipe