This paper introduces its technology summary, typical processing and general machines. At last this paper analysis the application states and developing trend in heating treatment home and aboard.
本文介绍了真空热处理的技术概况、典型工艺及通用设备,并分析讨论了国内外真空热处理的应用现状及发展趋势。
This paper analysis the reason why the middle error of unit weight in first class traverse of Nan Tong City (B area) is bigger with the principle of mathematic statistics;
本文运用数理统计学原理分析了南通市一级导线网(B区)单位权中误差偏大的原因;
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