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China water well drilling rig

DTH Hole Opener

                                                                                                                                                  DTH Hole Opener

D mm 165 178 190 216 254 305 381 305 381 445 482 660
D1mm 82 99 115 138 159 208 296 208 296 305 311 445
Gauge 14 16 16 16 16 16 16 16 16 18 18 19
Front 14 14 14 14 14 16 16 16 16 16 16 18
Shank DHD340
SD4
QL40
DHD350
SD5
QL50
DHD360
SD6
QL60
DHD380
SD8
QL80
SD10
NUMA100
SD12
NUMA120

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