Test conditions for machining centres . part 7 : accuracy of a finished test piece 多工序数控加工中心的试验条件.第7部分:成品试验件的精确度
2.
Ii testing of oxidic raw and finished materials - part 1 : spectrophotometric determination of iron and iron using o - phenanthroline 氧化原料和成品试验.第1部分:用邻菲咯啉进行铁