个税计算方法专利名称：TIN-FREE STEEL WITH SUPERIOR RETORT TREATMENT RESISTANCE艾灸中医
超频教程发明人：YAMAJI KIYOUKO,OGATA HAJIME,ICHIDA TOSHIROU,TSUGAWA SHIYUNICHI,IRIE
效的成语
TOSHIO词都
申请号：JP20897182
申请日：19821129
公开号：JPS59100290A
公开日：
做梦来月经了什么预兆
19840609
专利内容由知识产权出版社提供
摘要：PURPOSE:To obtain a tin-free steel with improved retort treatment resistance by regulating the amounts of anions SO<2->4 and F<-> which are leached in boiling water when the surface of a steel sheet is coated with two layers of metallic chromium and chromium oxide hydrate. CONSTITUTION:A film consisting of two layers of metallic chromium and chromium oxide hydrate is formed on the surface of a steel sheet to obtain a tin-free steel. When the amounts of anions SO<2->4 and F<-> which are leached in boiling water are reprented by X (mg/m<2>) and y (mg/m<2>), respectively, conditions during electrolysis and the thickness of the film are adjusted so that x and y satisfy equations 0<=x<2.4, 0<=y<1.8 and 1/3x+y<2.2. By the regulation a tin- free steel for a can suitable for a retort pack, etc. can be provided.襄阳旅游景点有哪些
春天的诗有哪些申请人：KAWASAKI SEITETSU KK
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