如果你用填充物，把填充物一边往后移一边问鼓手，以得到一个合适的、个在为了踩锤而没有把鼓皮调节的过分松弛的情况下尽可能多的低频下潜的调节。
If using padding, pull back the padding and ask the drummer to get the tuning "even" and as low as possible without making the head too loose for the beater.
进一步的分析表明：因控制性因素差异，边坡岩体松弛深度不同。
It is shown that the relaxation depth of rock mass at the slope is varied because of the different controlling factors.
利用地质力学模型试验方法，对上述两个问题进行了探讨，给出了确定开挖松弛区范围的方法，以及顺层岩质边坡的边坡走向与岩层走向夹角的上限值。
The large-scale model testing is one of the important methods to research style of structural internal force and stability of surrounding rock in double-arch tunnel.
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