Cov khoom siv raw rau ua lub hnab loj tshiab yog polypropylene, yog li polypropylene ua lub hnab loj li cas?
Feem ntau muaj cov haujlwm hauv qab no"
1. Polypropylene particle drawing. Tom qab cov khoom siv polypropylene tau yaj ntawm qhov kub siab, lawv tau kos rau hauv cov yeeb yaj kiab.
2. Woven silk daim ntaub rau hauv nruas, uas yog hu ua ntaub ntaub hauv kev lag luam.
3. Tom qab txiav cov ntaub hauv paus, xaws nws rau hauv lub hnab ntim.
