Puas yog IP67 txhais tau tias tsis muaj dej?
Cov khoom lag luam nrog IP67 Kev Ntsuas yog dej tsis zoo vim lawv cov qib siab ntawm ob qho tib si khoom thiab dej nkag. IP67- cov khoom ntsuas ntsuas muab kev tiv thaiv ntau dua li IP65 thiab IP66- cov khoom ntsuas, feem ntau hu ua 'water-resistant' dua li 'waterproof'
