Puas tuaj yeem ua kom cov neeg ua haujlwm? Dab tsi yog cov yas ua?
Cov Plastics feem ntau suav tias yog cov hluav taws xob tsis zoo heev, uas yog vim li cas lawv tau siv los ua kom insulating sheaths rau cables. Txawm yog, scientists have discovered that plastic conductors can be made by mixing plastics with a high concentration of filamentary carbon black and a coking compound. Plastic conductors are … Nyeem ntxiv
