管道与制暖
A. painting and decorating
B. plastering and drywall systems
C. plumbing and heating
D. refrigeration and air conditioning
木工
A. carpentry
B. cabinetmaking
C. bricklaying
D. joinery
route
A. 资格;限制;资历
B. 排;行;层;等级
C. 路线;(固定)线路;途径
D. 石匠;泥瓦匠
tier
A. 路线;(固定)线路;途径
B. 管道工
C. 护栏
D. 排;行;层;等级