railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools Different Machining Processes
In a grinding wheel marked with R – A – 48 – L – 7 – V – 25, L & 7 refers to:
1
Abrasive type & wheel structure
2
Abrasive type & wheel hardness
3
Wheel hardness & wheel structure
4
Wheel structure & wheel hardness