Cov laj thawj muaj peev xwm muaj raws li hauv qab no: Nws raug nquahu kom kuaj xyuas hauv khw.
1, nres rov qab caij nplooj ntoos hlav tsis ua hauj lwm.
2. Kev tshem tawm tsis raug ntawm cov nres nres thiab nres discs lossis sib dhos nruj heev.
3, tus nres ncoo thermal expansion kev ua tau zoo tsis tsim nyog.
4, tes nres rov qab tsis zoo.
Post lub sij hawm: Mar-08-2024