片语
elevator bottom shaft电梯井
main elevator shaft提升机主轴
elevator r shaft gates升降机井门
elevator r shaft升降机井
elevator well升降机井,电梯井
Boiler elevator shaft锅炉电梯槽
elevator bottom shaft bush升降机轴衬
Boiler steel elevator shaft锅炉电梯井钢结构
blank elevator shaft分级电梯井
elevator shaft gates升降机井门