Tsis yog.
Ntau ntawm cov nqe lus no yog cov ntawm lub Hoobkas kho tsheb thiab tsis yog kev tshawb fawb. Lub ntsiab lus semi-hlau nyob rau hauv thawj lub tsheb American muaj ntau cov hlau, koj puas tau hnov suab nrov? Lub suab nrov tsis yog ncaj qha ntsig txog hardness, sib tsoo disc thiab suab nrov tsuas yog qhia tias cov khoom lag luam tsis paub tab, thiab ntau npaum li cas hlau tsis muaj dab tsi ua rau nws. Nyob rau hauv qhov tseeb, cov ntaub ntawv hlau nyob rau hauv cov mis mas ua si lub luag hauj lwm ntawm kev sib txuas fillers thiab tshav kub conduction, nyob rau tib lub sij hawm, lawv tus kheej hardness thiab disc tsis txawv heev, yuav tsis ua rau loj hnav ntawm lub disc, lub tiag tiag disk thiab nce lub braking. muaj peev xwm tsis yog koj pom cov hlau no, tab sis koj tsis tuaj yeem pom cov hardness yog qhov nyuaj dua li cov nres disc sib tsoo tus neeg sawv cev muab tub lim lawv ua tau emery, Thiab koj cov ntawv xuab zeb, sib tsoo log belongs rau cov khoom qub.
Post lub sij hawm: Jun-06-2024