laminated composition shingles The double-layer Chinese red asphalt shingles are as bright and bright as the Chinese flag; they are placed on the roof like a red sun beautiful.
Pure tungsten Sheet The preparation method of tungsten sheet is to first press the tungsten powder by isostatic pressing and then sinter it at high temperature to prepare tungsten slab, and then roll the tungsten slab by rolling mill. The tungsten sheet a
Raw white vinegar, it doesn’t mean its “raw- without fermentation”, here means it can be working as a raw materials for flavoring or seasoning companies, ketchup manufactures and other industries will using vinegar as their main materials.