Setting And Hardening Of Portland Cement

[@grantorsjack3108]

Very good explanation mam
Thanks for the information 👍👍👍

[@ChavanPrem-ig6op]

Class super 😊😊😊

[@Iamvillagedestroyer]

Mojja baidew

[@Keshava4767]

Thank you 👍😊 madam

[@bindu8610]

What's ur age mam?you look too young and cute

[@gsr_creations]

Telugu👍

[@malikabid4951]

Good

[@rekhamgowtham7782]

Portland cement discovered by 1924 mam...😊

[@Ranjith-c2h]

1824

[@ChavanPrem-ig6op]

Potland cement discovered in 1824

[@sree_6343]

Its 1824

[@ShahidShahid-tj1yb]

Not 1924 it is 1824.

[@incredytech5457]

No it was Joseph aspdin who discovered cement in 1824 and after that William Aspdin discovered Portland stone in 1924

[@ChavanPrem-ig6op]

You will tell 1924

[@ChavanPrem-ig6op]

Wrong answer

[@ChavanPrem-ig6op]

Your tell wrong

[@SuniyePapaji]

Plz aap hindi mai samjhaya karo kyoki aap ki video india mai dekhi jati h worldwide nahi

[@manchonichalamanchonni1356]

Not everyone speaks Hindi in India