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GB/T 21838.5-2025
Metallic materials—Instrumented indentation test for hardness and materials parameters—Part 5: Linear elastic dynamic instrumented indentation testing (DIIT)
GB/T 24595-2025
Hot-rolled steel bars for quenched and tempered crankshafts
GB/T 17107-2025
Structural steel bars for forgings
GB/T 11251-2025
Alloy structural steel plate, sheet and strip
GB/T 46592-2025
Metallic materials—Mechanical testing of miniature specimen—Sampling and specimen preparation methods
GB/T 14847-2025
Test method for thickness of lightly doped silicon epitaxial layers on heavily doped silicon substrates—Infrared reflectance method
GB/T 5059.11-2025
Ferromolybdenum—Determination of molybdenum, silicon, copper and iron contents—Wavelength dispersive X-ray fluorescence spectrometry (fused cast bead method)
GB/T 15547-2025
Blanks of forged steel rolls for cold rolling mill
GB/T 20932-2025
Pig-irons—Definition and classification
GB/T 4702.2-2025
Chromium metal—Determination of silicon content—Perchloric acid gravimetric method and molybdenum blue spectrophotometric method
GB/T 29056-2025
Determination of impurity content in trichlorosilane for silicon epitaxy—Inductively coupled plasma mass spectrometry
GB/T 3884.16-2025
Methods for chemical analysis of copper concentrates—Part 16：Determination of silicon dioxide content—K2SiF6 titrimetric method and gravimetric method
GB/T 3884.1-2025
Methods for chemical analysis of copper concentrates—Part 1 : Determination of copper content—Iodine titration method and electrogravimetric method
GB/T 29914-2025
Oxidation catalyst for diesel vehicle exhaust purification
GB/T 26045-2025
Lead alloys ingot for accumulator cell slab lattice
GB/T 3207-2025
Bright steel
GB/T 3884.3-2025
Methods for chemical analysis of copper concentrates—Part 3:Determination of sulfur content—Gravimetric method and combustion-titration method
GB/T 3488.2-2025
Hardmetals—Metallographic determination of microstructure—Part 2：Measurement of WC grain size
GB/T 4326-2025
Extrinsic semiconductor single crystals measurement of Hall mobility and Hall coefficient
GB/T 46654-2025
Radiographic testing for titanium alloy castings—Defect levels