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Summary: Blocks are divided into three levels based on dimensional deviation, appearance quality, volumetric density, and comp[Read the full text]
Summary: Marking examples: strength level A, bulk density level B, superior There are seven strength levels: A, A, A, A, A, A [Read the full text]
Summary: Control standard for radioactive substances in building materials mixed with industrial waste - Determination of stead[Read the full text]
