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What is calcium carbide gas? What are the advantages? What are the uses?
Industry 317Days Ago (07-20)What is tourmaline? Tourmaline is also known as Tomalin, tourmaline, luminous stone, etc. tourmaline * * was discovered in Sri Kalan and is as precious as a diamond. Tourmaline is mainly composed of magnesium, aluminum, iron, boron and other...
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