Chapter No.3 Surface Contaminants and Tests for Detection

[@mohammadalam609]

Very nice

[@khurramzulfiqar9074]

Really helpful, jazak Allah khair😊

[@BG_LEARNERS_PVT_LTD]

Thanks

[@amalababu91]

Excellent ji ✨👍✨

[@guddubabu6942]

Kindly upload chapter 15, 16, 18, 21, 22 and 23.

[@zeeshanniazi4989]

Sir ye pdf book kaha se mile gi.

[@BG_LEARNERS_PVT_LTD]

I can send you, share your WhatsApp