兑水 发表于 2009-9-15 15:26:48

ASTM B 930-2003 硬质钨金额定粒度和反常大颗粒出现频率...

B930-03 Standard Test Method for Rating Grain Size and Frequency of Abnormally Large Grains in Cemented Tungsten Carbides (Hardmetals)
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