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1989年3月,我院机械系的“深孔电珩磨法高速镀硬铬新工艺”研究成果通过黑龙江省教委视同鉴定。该工艺技术指标达到并超过美国(ASTM)国家标准;比槽镀成本低2倍,生产率
In March 1989, the research results of “deep hole electric honing high-speed hard chrome plating new technology” of the mechanical department of our hospital passed the appraisal by the Board of Education of Heilongjiang Province. The process specifications meet and exceed the United States (ASTM) national standards; than plating bath costs 2 times lower, productivity