Machine and its planing tool making alternative step-wise movements along the working face

Follow

Industry

CPC
E21C27/40

This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C27/00Machines which completely free the mineral from the seam

Current Industry

E21C27/40Machine and its planing tool making alternative step-wise movements along the working face

Industries

Patents Grantslast 30 patents

Information Patent Grant
3216510
- Patent number 3,216,510
- Issue date Nov 9, 1965
- E21 - EARTH DRILLING MINING