1. Nylon ib-kov khawv koob muab tshuaj txhuam
2. Nrog hnav cov lus qhia daim ntawv lo
3. Cov ntaub zoo nkauj, mos thiab tsis ua rau tawv nqaij
4. Kev sib npaug sib npaug, du sewing ntawm qhov sib koom ua ke
5. Tsis yooj yim rau deformation, ntev elasticity
6. Kev ua haujlwm zoo, kev ruaj ntseg zoo
7. Kev tsim qauv, zoo shaping nyhuv