| 摘要 |
This invention relates to the reproduction method for an inner cylinder (1), especially for an air pressure cylinder or oil pressure cylinder. The infiltration materials, which include charcoal, cokes, cyanide of potassium and soda, percolate into the inner cylinder. Molten malleable iron(2) is poured into the interval between the interior of the cylindrical casting (3) and the exterior cylinder for two or three hours. After that, the malleable iron is demolished.
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