The needle of magnetic compass is generally supported on a
ANeedle bearing
BBush bearing
CJewel bearing
DBall bearing
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Related Questions:
The field book in chain surveying is about ................. and opens length
Length of a revenue chain is:
The accidental error of chain of length 'L' is proportional to:
The lines passing through points at which the magnetic declination is equal at a given time are called:
Too long chain may be adjusted by: