即使对皮带机实行变速调频，由于煤矿皮带机的运输特点和 和>安全需要，皮带机仍然保持在恒转速运行状态。
Even if the belt conveyor speed modulation, due to the transport characteristics of the belt conveyor and safety requirements, belt conveyor is still maintained at constant speed running state.
即使对皮带机实行变速调频，由于煤矿皮带机的运输特点和 和>安全需要，皮带机仍然保持在恒转速运行状态。
Even if the belt conveyor speed modulation, due to the transport characteristics of the belt conveyor and safety requirements, belt conveyor is still maintained at constant speed running state.
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