E21D1/08 - CPC Classification Index

ClassID:

135943 ⎘

E21D1/08 - CPC Classification

Classification description:

Sinking shafts while moving the lining downwards

Recent Application in this class:

20250389189

TOP-DOWN SEQUENTIAL-BUILDING CONSTRUCTION METHOD FOR DEEP AND LARGE VERTICAL SHAFT CAVERN GROUP

20180010392

Shaft enlargement arrangement for a boring system

20120200139

Underground mining

20120163919

Method for erecting an underground construction