Surveying Instruments

Surveying Instruments

4.11 - 1251 ratings - Source

raises or drops the plug in respect to the socket and thus regulates the rotation by changing the space that separates the two. ... Since the axis basically swims in an oil film, even for optimum regulation, uncontrolable wobble can occur when rotating the top part. ... In this case, a narrow guide ring (approximately 5 mm wide) on the lower end of the axis, and the ball bearing on the upper one, provide theanbsp;...

Title:Surveying Instruments
Author:Fritz Deumlich
Publisher:Walter de Gruyter - 1982-01-01


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