英语
西班牙语
英语
西班牙语
单语范例（未经PONS编辑处理）
The early skyscrapers used heavy plumb-bobs hung on wire in their elevator shafts.
en.wikipedia.org On the surface of a smoothly spherical, homogenous, non-rotating planet, the plumb bob picks out as vertical the radial direction.
en.wikipedia.org The gas supplies are plumbed to the control room, where they are routed to supply the system components.
en.wikipedia.org A plumbed room entered from the outside allowed fishermen and hunters to clean their catch and themselves.
en.wikipedia.org A section of the scaffolding would hold a plumb line that was centered over a datum mark on the floor.
en.wikipedia.org