医生、牙医和化学家们开发出的牙粉中含有研磨牙齿的物质，如砖灰、碎瓷器、陶器和乌贼。

These powders were developed by doctors, dentists and chemists and included substances very abrasive to teeth, such as brick dust, crushed China, earthenware and cuttlefish.

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干分段杯研磨机，在直角磨机使用，但磨水泥，砖，块石和所有类型。

Dry segmented cup grinders, used on right-angle grinders, they grind all types of concrete, masonry, brick, block and stone.

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制造高质量的花岗岩砖均采用优质原料、高铝硬质研磨介质、高压成型及快速烧成。

Superior raw materials, high alumina hard material used as grinding media, high pressure forming and fast firing are used for making high quality granite tiles recently.

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