E21D1/16 - CPC Classification Index

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Classification
E21D
E21D1/00
E21D1/10
E21D1/16

ClassID:

135948 ⎘

E21D1/16 - CPC Classification

Classification description:

Sinking shafts; Preparation of the ground by petrification

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Classification
E21D
E21D1/00
E21D1/10
E21D1/16

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