短語詞組短語elevator bottom shaft 電梯井elevator r shaft 升降機井elevator bottom shaft bush 升降機軸襯elevator r shaft gates 升降機井門elevator shaft gates 升降機井門blank elevator shaft 分級電梯井Boiler elevator shaft 鍋爐電梯槽;鍋爐電梯井main elevator shaft 提升機主軸Boiler steel elevator shaft 鍋爐電梯井鋼結構 返回 elevator shaft