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ساخت قطعات پیشساخته بتنی: مانند بلوکها، تیرچهها و دالهای بتنی در عوض بعضی از کارخانهها مستقیما محصولات خود را به مشتریان عرضه نمیکنند و به جای آن معمولا محصولات خود را از طریق بازار ب
Coal ordinarily has long been a important A part of the coke-earning process. The coal is crushed and floor right into a powder and after that billed into an oven where it really is heated to around 1800°F while in the absence of oxygen. given that the oven is heated, the coal commences to melt so almost all of the volatile make any difference lik