Non-coal underground mine is big and complex system, carry out safe appraisement must first the existent major dangerous, harmful factor in system argue one by one to know.
非煤地下矿山是个大而复杂的系统，进行安全评价必须首先对系统中存在的主要危险、有害因素逐个进行辩识。
The field application indicated that the lifting liquid viscosity, pumps the diameter are key factor influencing lifting capacity of oil extraction system of non-tubing.
现场应用表明，举升液体粘度、泵径是影响无油管采油系统举升能力的关键因素。
And the paper discuss the non-linearity factor and disturbance factor in the inverted pendulum system, at the same time explain some rules in the designing circuit.
并讨论了倒立摆系统的非线性因素和干扰因素，以及对电路设计时应注意的问题。
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