Roofing Slate:- The common spec are 60X30,50X25 40X25 40X20 30X20,30X15CM,thickness about 5~8mm,colors are black,yellow,green,sliver gray and
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Flooring Slate :- The common spec are 30X30,30X60 40X20 40X40 40X60cm,thickness about 10~12mm,colors are black,yellow,green and rusty. Sides
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