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S120 等温模锻工艺及节能的探讨;十二所;共4页 1.50元S121 锻造加热炉的选择——连续煤气加热炉在锻造生产中的应用及炉墙改进;上海第一石油机械厂;共11页 8.60元
S120 isothermal forging process and energy-saving research; 12 1.50 yuan S121 choice of forging furnace - continuous gas furnace in forging production and application of furnace wall improvement; the first Shanghai Petroleum Machinery Factory; a total of 11 pages 8.60 yuan