Manufacturing And Production Technology
In a planer

Work is stationary and tool reciprocates
Tool moves over stationary work
Tool moves over reciprocating work
Tool is stationary and work reciprocates

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Manufacturing And Production Technology
Jigs are used

For holding and guiding the tool in drilling, reaming or tapping operations
For holding the work in milling, grinding, planing or turning operations
To check the accuracy of workpiece
None of these

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