The formula of calculation of support system resistance and yieldability under condition of medium stable roof is derived and proved through eguivalent model testing.
推导出了中等稳定顶板条件下计算支护系统所需阻力和可缩量的公式，并进行了相应的模拟实验研究。
Furthermore, through market investigation, the paper analyzes and compares several Testing Devices for Tower Grounding Resistance.
同时，文章通过市场调研，分析比较了市场上出现的几类杆塔接地电阻测试装置。
Through the performance test it got out, this testing system has advantages of large measuring range, stability, fast response, activation resistance and long life for its sensor.
通过性能试验得出，该检测系统具有检测范围大，稳定性好，响应速度快，抗激活和传感元件使用寿命长等显著优点。
Through the performance test, this testing system has advantages of large measuring range, stability, fast response, activation resistance and long life for its sensor.
通过性能试验得出，该检测系统具有检测范围大、稳定性好、响应速度快、抗激活和传感元件使用寿命长等显著优点。
Through testing the relative property of the elastic fabric, it is considered to has better creasability, higher strength and better abrasion resistance.
通过对弹力织物的相关性能进行测试，认为该织物具有良好的抗折皱性，且强度高、耐磨性好。
Through testing the properties of fly ash pavement concrete in the lab and field, we get ample data on flexural strength, abrasion resistance, penetrability resistance and frost resistance.
针对粉煤灰道面混凝土的性能，在试验室和现场进行了系统的研究。
Through testing the properties of fly ash pavement concrete in the lab and field, we get ample data on flexural strength, abrasion resistance, penetrability resistance and frost resistance.
针对粉煤灰道面混凝土的性能，在试验室和现场进行了系统的研究。
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