Honed leeg yog tsiag ntawv los ntawm lawv cov qhov tseeb siab thiab qhov chaw sab hauv. Lawv tau ua los ntawm cov hlau qib siab, uas undergoes ib txheej txheem kev txhawb nqa kom ua tiav kom ua tiav kev thev taus. Cov txheej txheem no tsis tsuas yog kho cov raj sab hauv tab sis kuj txhim kho lub raj raj ntawm cov khoom siv, ua rau nws muaj ntau ruaj thiab hnav. Honed leeg tau siv dav hauv kev tsim cov kheej kheej kheej, uas lawv ua raws li lub piston kom txav tau zoo nyob hauv lawv.
Sau koj cov lus ntawm no thiab xa mus rau peb