TREA

more than one of the layers being composed of insulating material

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Industry

  • CPC
  • E04D3/354
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Parent Industries

EFIXED CONSTRUCTIONS E04Building E04DROOF COVERINGS SKY-LIGHTS GUTTERS ROOF-WORKING TOOLS E04D3/00Roof covering by making use of flat or curved slabs or stiff sheets

Current Industry

E04D3/354more than one of the layers being composed of insulating material
Industries