4. Acoustics
  5. Sound-modifying means
  6. Muffler, fluid conducting type

Francois J. M. Maume

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Drill soundproofing device

Boring or penetrating the earth – With tool shaft detail
Patent

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Sound-proofing casing for a pneumatic percussive drill

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Profile ID: LFUS-PAI-P-1274722

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