industry production testing needle enterprises, selection of carbon tool steel materials, with strong resistance to abrasion;
业生产测试针企业,选用碳工具钢材料,具有耐磨性强;
The specific resistance of coal-derived needle coke is determinated on the model THS-80 particle specific resistance gauge. The effects of sample size range and loading height on specific resistance determination is investigated and the optimal testing conditions is also obtained by use of orthogonal experiment.
利用THS-80型粉末比电阻测定仪,测定煤系针状焦的比电阻,探讨试样粒度和装样高度对测试值的影响,并利用正交试验的方法确定较优的测试条件。
This part describes the designing of the needle bearing testing machine, which is used for the bearing wearing test.
其次,进行了襟翼滚针轴承磨损试验机的设计。
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