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Plz explain it step by step and tell me how 1200 and 20 and 1000 from where it came in FR(N) ? and give me small explain

Posted: Wed May 11, 2022 6:28 am
by answerhappygod
Plz explain it step by step
and tell me how 1200 and 20 and 1000 from where it came in FR(N)
?
and give me small explain and rouls for MTBE and MTTF