corundumite

常见例句

• Thetesting results of changed performance of corundumite brick after immersed for a long time are put forward.The suggestions of existingproblem at present and the work from now on are put forward.
  提供了刚玉砖等被水长时间浸泡后性能变化的检测结果，并对目前存在问题和今后工作提出了建议。
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