railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Fitter Machining Drilling and Reaming

एक सामान्य उद्देश्य (मानक) ड्रिल के कोण का बिंदु क्या है?

1
148°
2
138°
3
118°
4
128°
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