- bare string
- 光: light; ray
- 管柱: tubular column
- 光管: bare pipe; fluorescent lamp; fluorescent light; light pipe; light tube; plain-end tube; plain-tube; x-ray tube x
- 管柱: tubular column◇管柱基础 tube caisson foundations; 管柱桩 hollow tube pile
- 荧光管;光管: fluorescent tube
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