Means for loosening pipes in underground borings

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Bibliographic Details
Main Author HERBOLD WOLFGANG KONRAD JACOB
Format Patent
LanguageEnglish
Published 10.01.1956
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Bibliography:Application Number: US19520278525