کلمه portland cement یافت شد:
n: the cement most widely used in oilwells. It is made from raw materials such as limestone, clay or shale, and iron ore.
n: The product obtained by pulverizing clinker consisting essentially of hydraulic calcium silicates. Portland cement is the most common type of cement used for oil- and gas-well cementing.
a general class of cement that encompasses the most common cements used in construction and the oil field.
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