The sample from the meteorite was far too small to test for hardness, except to show that it is certainly harder than regular diamonds.
如果要检测硬度，陨石的标本就太小，它只能显示出这种物质无疑比一般钻石硬。
2
The evaluation of measuring uncertainty in metallic material Brinell hardnesstest is studied by testing the hardness of the 45 quenched and tempered steel.
以45#调质钢硬度试验为例，研究了金属材料布氏硬度试验中测量不确定度的评定。
3
The quality analysis for gas nitrocarburized inner gear ring of heavy truck imported from Austria was taken by means of macro/micro-examination, hardness measuring and running test.