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This book teaches you everything about one of the most useful and lesser-known surveying instruments. Invented in the 1870s, the Abney level grew popular in the 20th century and is still in use today by foresters, surveyors, geologists, and safety inspectors. \
This book teaches you everything about one of the most useful and lesser-known surveying instruments.
Invented in the 1870s, the Abney level grew popular in the 20th century and is still in use today by foresters, surveyors, geologists, and safety inspectors.
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