Study on the stratification and critical size in siderite heattreatment 菱铁矿热处理分层现象及临界线度的研究
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Abstract : the summarization and tromsformation of the heattreatment circle of shanghai are dwelled shorty upon in this paper as well as the forecast of market . the plan and proposal of the trade plan are presented as well 文摘:简要分析了上海市热处理行业概况，热处理行业发生的变化，市场预测与需求，提出了行业规划思路和目标建议等。
