THE STUDY OE MTZ77S WIRELINE CORING PERCUSSION ROTATION DRILLIG TOOL[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(1): 64-66,71,72.
Citation: THE STUDY OE MTZ77S WIRELINE CORING PERCUSSION ROTATION DRILLIG TOOL[J]. COAL GEOLOGY & EXPLORATION, 1991, 19(1): 64-66,71,72.
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THE STUDY OE MTZ77S WIRELINE CORING PERCUSSION ROTATION DRILLIG TOOL

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    • Abstract
  • It introdnial the stricure, operation princuple, techni al specifications, performance index and operating results of MTZ77S wireline coring percussion rotation drilling tool.
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