haulage roadway meaning in Hindi

Examples

1. The design of automatic air door in trackless main haulage roadway
2. Analysis on roof - fall cause in 131211 haulage roadway in yueliangtan mine
3. Optimized design of support parameter of main haulage roadway in jinjia mine
4. Reinforcement of bolt and grouting in main haulage roadway in linhuan coal mine
5. Double track haulage roadway