4. Ammunition and explosives
  5. Blasting
  6. Patterned blasting

Dong Soo Shim

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Blasting apparatus for forming horizontal underground...

Ammunition and explosives – Blasting – Detonation wave modifying
Reexamination Certificate

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Center-cut method for tunnel excavation utilizing large...

Ammunition and explosives – Blasting – Patterned blasting
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2496426

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