कास्ट आयरन या हार्ड स्टीलके लिए किस इब्रेसिव का प्रयोग किया जाता है।

aडायमंड bसिलिकन कार्बाइट c बोरान कार्बाइट d एलमिनियम ऑक्साइड

• Roshan
• 1329 Views
• 1 Answers

• B

  • Shivratan
  • 12 Apr
  • 0 Comment

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