136208 ⎘
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor in galleries at the junction with the working face
MINING SYSTEMS
#2Mining systems
#3Mining systems
#4Mining methods and equipment
#5Mining systems with guidance systems
#6Apparatus, system, and method for supporting a gate entry for underground full extraction mining