The line on porcelain refers to the line cracks in the process of use, circulation and storage of the porcelain products produced and the porcelain unearthed underground.
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The threading of porcelain is divided into the following two types:
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First, closed impulse:
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Porcelain crack line is closed, opaque line.
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Two, opening (porcelain dislocation deformation)
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Porcelain after damage out of shape and dislocation cracks, can be through the light.