您要查找的是不是：
- 层layer
- 三层刺网trammel net
- 三层甲板的船a three-decker
- 三层布料three thickness of cloth
- 教室在三层。The classroom is on the second floor.
- 我们上了大楼的三层。We went up to the third floor of the large building.
- 三层布three-ply cloth
- 三层纸three-ply paper
- 三层厚threeply
- 三层块three fold block
- 成三层[机] treble
- 三层PE3 -ply PE coating
- 三层VPNlayer3 VPN
- 三层环shellring
- 三层结three-layered node
- 三层C/Sthree - tier Client/Server
- 三层栈three layer stack
- 三层网triple-layer forming fabrics
- 三层带triple
- 三层法three-layer process
