Non-ferrous metals(Classification list) The most comprehensive collection of Chinese national standards and industry standards | CN Standards

YS/T 309-1998 Abolished

YS/T 309-1998 Aluminium rare-earth alloy ingot for remelting

Publish Date: 1998-11-03

YS/T 53.3-1992 Abolished

YS/T 53.3-1992 The chemical analysis methods for copper, lead, zinc raw ore and tailings using flame atomic absorption spectroscopy to determine silver content

Publish Date: 1992-07-14

YS/T 53.2-1992 Abolished

YS/T 53.2-1992 Copper, lead, zinc primary and tailings chemical analysis method flow injection - 8531 fiber microcolumn separation and enrichment - flame atomic absorption spectrometric determination of gold content

Publish Date: 1992-07-14

YS/T 53.1-1992 Abolished

YS/T 53.1-1992 Copper, lead, zinc raw ore and tailings chemical analysis method of fire gold enrichment-flame atomic absorption spectroscopy and thiocyanate spectrophotometry for determination of gold content

Publish Date: 1992-07-14

YS/T 31-1992 Abolished

YS/T 31-1992 Mercuric chloride catalyst

Publish Date: 1992-03-09

YS/T 24-1992 Abolished

YS/T 24-1992 The inspection method for extrusion nail defects

Publish Date: 1992-03-09

YS/T 23-1992 Abolished

YS/T 23-1992 The method of measuring the thickness of a silicon epitaxial layer using stacking dislocation size

Publish Date: 1992-03-09