This paper deduced the formulae to calculate the parameters of shotcreting and bolting in three types of surrounding-rock-loosened ring individually from the theory of surrounding rock loosened ring.
以围岩松动圈理论为依据，分别对三类围岩松动圈的巷道围岩全长胶结锚杆的锚喷支护参数进行了公式推导及计算。
According to classical control theory, using current, speed and position control as a three-ring system control strategy.
文中根据经典控制理论，采用电流、速度、位置三环控制作为系统控制策略。
On the basis of analyzing and discussing the structural theory of Three-Ring gear reducer, this dissertation gave a new scheme of planetary gear reducer with few teeth difference.
本文在分析和讨论了现有的外平动三环减速机结构的基础上，提出了一种新的内平动少齿差行星减速机的结构方案。
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