centralized juxtapose ventilation
...中央并列式通风 [gap=2714]trict;comprehensive mechanization;overh-ead line elect-ric locomotive transport; centralized juxtapose ventilation. ...
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central compound -like ventilation
...中央并列式通风 [gap=1200]Key word: Vertical shaft； Single leve；incline long wall mining coal；central compound -like ventilation ...
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