... and roadbed reinforcement,etc 3.Diameter:25/28/32mm Mining rock anchor , matched with good fittings, is made of seamless ... so the cracks are fully filled and the fractured rock is improved.5 With the high-strength coupling elongated by ... the place with narrow space, achieving the aim of rock reinforcement with extra-long anchor.6 Its unnecessary to take ... *6mm,150*150*6mm,150*150*8mm. mining rock anchor