针对马蒂尔自移机尾装置在井下使用中出现的一些问题，对其局部结构进行了改造，以适应井下作业的需要。
In view of the problems occurred during underground application of Mattill self-advancing tail device, some structures of it is improved in order to satisfy the requirements for underground operation.
针对马蒂尔自移机尾装置在井下使用中出现的一些问题，对其局部结构进行了改造，以适应井下作业的需要。
In view of the problems occurred during underground application of Mattill self-advancing tail device, some structures of it is improved in order to satisfy the requirements for underground operation.
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