4. Communications, electrical: acoustic wave systems and devices
  5. Seismic prospecting
  6. Land-reflection type

Fred W. Ng

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Coal seam discontinuity sensor and method for coal mining appara

Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent

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Method and system for vertical seismic profiling by measuring dr

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent

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Profile ID: LFUS-PAI-P-981551

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