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Summary: If the purchasing unit needs other specifications, they can negotiate with the production factory to determine. as th[Read the full text]
Summary: Blocks are divided into three levels based on dimensional deviation, appearance quality, volumetric density, and comp[Read the full text]
Summary: The following standards contain provisions that constitute the provisions of this standard by reference in this stand[Read the full text]
Summary: There are seven strength levels: A, A A, A, A, A, and A as the main raw materials, with an appropriate amount of aera[Read the full text]
