12-18 19:30:47 The stratum classification name represents the rock formation theory. It is recommended that the drilling speed increase the drilling length. It is recommended to use the drill bit. Level 1 and 2 loose soil. Loose rock, secondary loess, secondary red soil, soft and free of gravel and breccia 15m/h 2.8m/sub-sand, diatomite loess, red clay, peaty, clay, sandy, kaolinite 8m/h2.40m/sub-alloy drill bit, small tooth composite drill bit, ordinary composite drill bit alloy bit, small-tooth composite chip bit, ordinary composite chip bit 3 grade soft rock strong weathered shale, slate, schist and schist, slightly cemented 6m/h sand layer 4 grade 5 6-7 grade 10-11 Grade 12 soft rock shale, sandy shale, oil shale carbonaceous shale, calcareous shale, interbedded sand and shale, argillaceous limestone, hard rock gravel and gravel layer, and collapse grade Layers, argillaceous slate, sericite chlorite slate, schist, limestone, marble chlorite, mica, slate, Qianmu rock, schist, silicified limestone, calcite silicified mica rock, gneiss, 8- Grade 9 hard rock basalt volatile green rock volatile 1.2m/h rock, quartz andesitic porphyry granite, granodiorite, gneiss, rhyolite, quartz 0.8m/h hard rock, hard rock, dichotomy , Jasper rock, corner shale, corundum rock, quartz, shale, jasper 5m/h 1.7m/time 3m/h 1.50m/time|2m/h ordinary composite bit, triangle 2.00m/time composite bit, bread Type composite drill bit, blade type composite drill bit, ordinary composite drill bit, triangle composite drill bit, bread type composite drill bit, blade type composite drill bit, 'Fengspeed Six' drill bit, ordinary composite drill bit, triangular composite drill bit, bread type composite Chip electric drill
bit, blade-shaped composite chip drill bit 'Feng speed six' drill bit, reinforced composite chip 1.30m/time one drill bit, steel helmet tooth composite chip drill bit, height 1.10m times I electroplated diamond drill bit 'Feng speed six' bit thickened composite chip drill bit, blade-shaped composite chip 0.85m/time-drill bit, steel helmet tooth composite chip drill bit, regular | 0.65m time I gauge electroplated diamond drill bit, hot-pressed diamond drill bit, 'Fast Speed u200bu200bSix' drill bit matrix sintered drill bit , Low-degree electroplated diamond, hot-pressed drill bit 'Fengspeed Six' drill bit matrix sintered bit, very low-degree electroplated diamond, hot-pressed drill bit 'Fengspeed Six' drill bit 0.50m/time 0.32m time 0.30m/h | 0.16m/ TimesRonix Tools
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