Document Type and Number:
Japanese Patent JPS50158404
Kind Code:
U
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| JP3187326 | VERTICAL HOLE EXCAVATOR |
Application Number:
JP7061374U
Publication Date:
December 27, 1975
Filing Date:
June 17, 1974
Export Citation:
International Classes:
E21B7/00; E02F3/06; (IPC1-7): E02F3/06
Domestic Patent References:
| JPS4944902A | 1974-04-27 | |||
| JPS47941A |