Kodi mungadulire bwanji nsalu popanda kuphwanyika? Makina odulira a CO2 laser akhoza kukhala njira yabwino yodulira nsalu ya thonje, makamaka kwa opanga omwe amafunikira kudula kolondola komanso kovuta. Kudula kwa laser ndi njira yosakhudzana ndi chinthu, zomwe zikutanthauza kuti...
Momwe Mungadulire Kevlar? Kevlar ndi mtundu wa ulusi wopangidwa womwe umadziwika bwino chifukwa cha mphamvu zake zodabwitsa komanso kukana kutentha ndi kusweka. Unapangidwa ndi Stephanie Kwolek mu 1965 akugwira ntchito ku DuPont, ndipo kuyambira pamenepo wakhala ...