YB T 4381-2014 Corundum-mullite bricks《刚玉莫来石砖》.pdf

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YB T 4445-2014 High-purity mullite bricks for lime kiln《石灰窑用高纯莫来石砖》.pdf

YB T 4692-2018 低导热多层复合莫来石砖.pdf

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