DTH shroud drill rodOD508mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex for pile foundation work

DTH shroud drill rodOD406mm 1-4M with 135 hexagonal hex,320 dth hex for pile foundation work DTH shroud drill rodOD426mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex for pile foundation work DTH shroud drill rodOD450mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex for pile foundation work DTH shroud drill rodOD508mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex for pile foundation work DTH shroud drill pipe OD508mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD558mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD610mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD660mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD711mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill pipe OD508mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD813mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH shroud drill rodOD914mm 1-4M with 135 hexagonal,170dth hex 273 hexagonal hex,320 dth hex DTH Hex Connections Tianjin huachang xingye technology co ltd produce DTH Shroud rod drill pipe with Hex connection up to 911 mm for big-hole-drilling with DTH hammer up to 30" and crossovers