... minie,roads,bridges. B47 Pneumatic Breaker1.Instruction:B47 pneumatic breaker belongs to a kind of pneumatic instrument combined with ... featured with portability, durability, high efficiency and speedy, the breaker machine can break ferroconcrete, rocks and asphalt. Its an ... for construction and back out of mines, bridges, roads, water pipes and electricity grids.2.Product Specifications: Weight21.5 ...