4. Measuring and testing
  5. Vibration
  6. By mechanical waves

Pengfei Yang

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Apparatus and method for a drilling assembly

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Circular arc wide beam transmission method and apparatus for...

Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2303443

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