RAISING BORING

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Bibliographic Details
Main Authors TREVELLYN MOELLER COLTMAN, WILFRED JOHN DAVIES
Format Patent
LanguageEnglish
Published 27.02.1991
Edition5
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Bibliography:Application Number: ZA19900003183