But from abroad in the use of the airport runway friction coefficient test purchase of vehicles demarcation device error is found, it is impossible to guarantee the next instrument.
但在使用从国外购买的机场跑道摩擦系数测试车过程中发现标定装置误差太大，根本无法保证接下来的测量。
The performance of various of cable conduits is analyzed. The inspection of cable conduits and test of friction coefficient is described. The buried depth of cable conduits is calculated.
对各种电缆导管的性能进行了分析，叙述了电缆导管的检验以及摩擦系数的测试，并对电缆导管的埋地深度进行了计算。
Structural features, material analysis, manufacturing process, friction coefficient measurement and rated life test of the bushing are discussed.
本文介绍了这种衬套的结构特点、材质分析、制造工艺和摩擦系数测量及规定寿命试验的试验过程。
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