boron carbide powder

boron carbide powder

boron carbide powder FEPA standard:F240 F280 F320 F360 F400 F500 F600 F700 F800 F1000 F1200 F1500 F2000

boron carbide powder JIS standard:#240 # 280# 320 # 360 #400# #500 #600 #700 #800 #1000 #1200 #1500 #2000 #3000 #4000 #6000 #8000 #10000

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