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United States government master specification for slate-surfaced asphalt prepared roofing and shingles
Rag roofing felt saturated and coated on both sides with asphalt and surfaced on the weather side with granulated slate or similar material; methods of inspection and testing, packing and marking.
United States government master specification for slate-surfaced asphalt prepared roofing and shingles
Rag roofing felt saturated and coated on both sides with asphalt and surfaced on the weather side with granulated slate or similar material; methods of inspection and testing, packing and marking.
United States government master specification for slate-surfaced asphalt prepared roofing and shingles
US Bur Standards -- Circular
1925
6 pages
Article (Journal)
English
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United States Government master specification for asphalt for mineral-surfaced roofing
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