[4] mining districtis������

[5] raises����ɽ

[6] intake and return gates�����ν���ͻط�ƽ��

[7] draw off�����ϣ����

[8] gob area���ɿ���

[9] air leakage��©�磬����й©

[10] gob edge���ɿ�����Ե

[11] gate being chocked������ľ������ƽ��

[12] duct������

[13] airmover�����ѹ������Ӧ��ͨ���ã�

[14] pre-formed gate��Ԥ���γɵ�����ƽ��

[15] homotropal ventilation��˳��ͨ��

[16] permanently�����õ�

[17] coal rib��խú��

[18] roadside pack�����Գ���

[19] cut-through��������

[20] stop off����գ���������ǽ���粼�ȣ�

[21] divert back������ƶ�

[22] rise����ɽ����

��һҳ[1][2][3]