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explain grinder machine blasting wekipedia

Foundry - Wikipedia, the free encyclopedia

A foundry is a factory that produces metal castings. Metals are cast into shapes by melting them into a liquid, pouring the metal in a mold, and removing the mold ...

Cement - Wikipedia, the free encyclopedia

A cement is a binder, a substance that sets and hardens as the cement dries and also reacts with carbon dioxide in the air dependently, and can bind other materials ...