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。
2
It is also the fiber chemical properties is very stable, but also has strong acid resistance and alkali resistance properties in the process of operation.
它的纤维化学性能也是非常稳定的，而且在操作的过程中具有较强的耐酸性能以及耐碱的性能。
3
The anaerobe resistance fungus medicine has the stable sensitivity.