3m reclaim tunnel demonstration

This video shows the versatility of the Zipper truck system. We are able to create tunnels with openings very quickly with no permanent support work. This arch can be used as a mining reclaim tunnel or storage vault with top access. Update: February 19, 2015. I'd like to thank EVERYONE for their interest and great comments and suggestions regarding our brand new system. If you're a loader operator in the Cascadia area near Vancouver, BC or anywhere else in North America, we'd like to hea

• #فناوری_و_رایانه
• #arch
• #zipper_truck
• #zipper_invention