标准号:IS 6890 Pt.1-1989
发布日期:1990/1/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This standard (Part 1) prescribes methods for chemical analysis of dental gold alloys having chemical composition within the following range:Constituents PercentGold Above 28Silver 3 to 30Copper 2 ? 25Palladium 0 ? 40Platinum 0 ? 50Zinc 0 ? 2Nickel 0 ? 2