This “Zipper Truck” can build a tunnel in 24 hours.

This “Zipper Truck” can build a tunnel in 24 hours. Clearly, this isn’t your regular truck. It’s a custom build that allows masons to erect free-standing tunnels very fast. The roller-covered arched rear temporarily supports the Lego-like brick structures, which are then locked in place without the need for an adhesive.



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