The U.S.B.R. system (U.S.B.R., Earth Manual, 1963) is essentially their mechanical crossarm settlement apparatus but with one base ... The instruments used include aWilda T3 theodolites, aWilda N3 precise levels and aZeissa Ni2 and a Zeiss.
Title | : | Australian Geomechanics Journal |
Author | : | |
Publisher | : | - 1971 |
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