Physics · Engineering Drawing
ISO सतह बनावट मानकों के अनुसार, उस ISO खुरदरापन ग्रेड संख्या (roughness grade number) की पहचान करें जो 0.2 μm के औसत खुरदरापन (R a ) मान से मेल खाती है।
- 1N3
- 2N1
- 3N2
- 4N4✓
सही उत्तर देखें
N4
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