• 瓷砖轻轻敲击如果清脆带着一些金属则表明内在质量非常硬度较高

    Take two pieces of tiles tap brick, if the sound is crisp, with some metal sound that its intrinsic quality is very good, the hardness is higher;

    youdao

  • 瓷砖轻轻敲击如果清脆带着一些金属则表明内在质量非常硬度较高

    Take two pieces of tiles tap brick, if the sound is crisp, with some metal sound that its intrinsic quality is very good, the hardness is higher;

    youdao

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