01Zhigao ZGYX420-1
Surface rock, quarry, mine and construction drilling, subject to hole diameter, geology, rods and hammer configuration.
- Year
- 2022
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01Surface rock, quarry, mine and construction drilling, subject to hole diameter, geology, rods and hammer configuration.
02Surface rock, quarry, mine and construction drilling, subject to hole diameter, geology, rods and hammer configuration.
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21Rock and surface drilling after hole diameter, depth, formation and air requirements are confirmed.
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