P11 and P12 Pipes
Explain difference between the P11 and P12 Pipes?
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a) P11 chromium molybdenum composition which is 1% of chromium and 1/4% of molybdenum.
b) P12 chromium molybdenum composition which is 1% of the chromium and 2% of the molybdenum.
Explain the term hard links?
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