Which code is followed by the corrosion of metals?

• A. Burger‚Äö√Ñ√∂‚àö√ë‚àö¬•s vector
• B. Pilling‚Äö√Ñ√∂‚àö√ë‚àö¬®Bedworth
• C. Frank-Read mechanism
• D. Miller‚Äö√Ñ√∂‚àö√ë‚àö¬•s theorem