The surface should be smooth, no foreign impurities and injury. The finished products should be polished after the cut into the appropriate size.

试样的表面应光滑，无外来杂质及损伤。成品应经打磨后裁制成相应尺寸。

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The surface should be smooth, no foreign impurities and injury. The finished products should be polished after the cut into the appropriate size.

试样的表面应光滑，无外来杂质及损伤。成品应经打磨后裁制成相应尺寸。

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