Thaum mus, cov roj lim cartridge muaj qhov hlau, ntxaij hlau, nylon hom, xws li dej txeem ceramics; diesel roj lim lim cartridge pam, nylon, paj rwb hom, thiab hais txog. Cov ntxaij lim dej ntawm kev, ntev pab lub neej, yeej tsis lim efficiency, complexity, muaj nqi, nkawm disadvantage phim tau lawm maj phased.
Siv roj lim los lim-lim. Tom nimno, cov roj lim thiab diesel roj lim yog ib feem ntau yog siv ntawv micro ntxeem tau lim, cob phenolic, yog ua los ntawm tais tubular, zoo kawm thiab lim ntshav efficiency, yooj yim qauv, yig, qho yooj yim uas tswj, thiab lwm yam zoo.