... : R25, R32, R32, R38, R51, T76 3)Drilling, grouting, anchori Self drilingl grouted anchor bolt is applicable to engineerings of railway, highway, tunnel ... conditions, which no other material can serve as the substitution.Anchor bar: R25N, R32L, R32N, R38N, R51N, T76NAnchor coupling: R25, R32 ...