1.Nws yog siv los ua hnyav ntawm nitrocellulose, cellulose ether, hluavtaws resin thiab natural resin, nruab nrab ntawm cov tshuaj tua kab pyrethrin thiab tshuaj phenobarbital.
2.Hauv kev lag luam ntsuas, nws yog siv los kho cov xim thiab kaw lub cathode ntawm electron raj.
