Prevention of corrosion || 9th class chemistry || ch.no.7

[@umar11260]

An extra ordinary informative lecture.amazing

[@HayatKhan-jq8ng]

Absolutely right❤❤❤❤❤❤❤

[@muhammadabdulrazzaque5382]

Masha Allah nice sir

[@AbdullahSalamatvlog]

Nice

[@MuhammadIrfan-zt9rh]

nice *

[@saqinice7673]

Nice your leacture

[@Sunny123816]

What about cathodic protection wohi to mushkil ha sir

[@KhanShb-h6w]

Nice 👍👍

[@shafeyrafey3158]

Sir nice lecture
Sir agr Ham book wala na Kara or Jo abna na board par lithk ha wo kar la to hama number mi ja ga

[@M-Naqvi356]

sir ap kidhar parhatay hain?

[@usmankhan7896]

Good

[@Muntazir-m9s]

Nice