Which tunnels can be shared by multiple coal seams? （ ）
A: Rise and dip
B: District cross-cut
C: District station
D: Haulage way of section
A: Rise and dip
B: District cross-cut
C: District station
D: Haulage way of section
举一反三
- In the strip district, which belongs to the entry? ( ) A: Work face haulage gateway B: Work face air return gateway C: Open-off cut D: Winches
- Stages can be further divided into( ). A: Mining district B: Panel C: Strip district D: Section
- Which of the following is not a common type of rise coal haulage ( )? A: Pipeline haulage B: Belt conveyor haulage C: Tramcar haulage D: Autogenous haulage
- Which district is the youngest? A: District 2 B: District 3 C: District 4 D: District 5
- An ____district is a district which consists of factories and warehouses.