4. E - Fixed Constructions
  5. 21
  6. B

Rock drill

E - Fixed Constructions – 21 – B

Patent

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255/44

E21B 1/38 (2006.01)

Patent

CA 873753

Pekka M. Salmi

E - Fixed Constructions – 21 – B
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G - Physics – 21 – G
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Oy Tampella Ab

C - Chemistry – Metallurgy – 02 – F
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