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Diatomaceous earth is a single-cell alga, which is extremely small, generally only a few microns to tens of microns. Its colors are white, grayish white,and light brown gray, г.д. Its main physical properties are looseness, light weight, porosity and strong permeability, good thermal stability, добрая хімічная ўстойлівасць, and it is…
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Фабрыка вогнеўпораў Rongsheng
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