Mobile rotary drill rig

Details Mobile rotary drill rig Mobile rotary drill rig

1977-01-19

1979-11-27

Gandy, James M.

Machines not elsewhere specified

Agricultural or construction machinery

Drilling, mining, or soil treatment

D1504

Patent

active

D02535351

REFERENCES:
patent: D244190 (1970-05-01), Swartz et al.
Drilling, 1/76, P64, Drill Rig, center left side of page.

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