Engineering:Roofing slates
From HandWiki
Roofing slates are roofing tiles made out of slate. The rock is split into thin sheets which are cut to the requires size before shipment. This contrasts to slabs which are milled to produce larger structural components.[1] They are the primary product of the slate industry.
See also
References
- ↑ Structural Slate: Uses and Standardized Types. Structural Slate Company. 1927.
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