railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Metrology and Inspection Surface Roughness

निम्नलिखित में से कौन-सा सतह परिष्करण के साथ संयोजित नहीं है?

1
Ra
2
Rz
3
Rmax
4
 Rn
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