Kev paub

Petroleum resin yog siv nyob rau hauv ntau yam teb

2022-10-26

1. Xim 2. Roj Hmab 3. Adhesive kev lag luam 4. Ink kev lag luam 5. Kub yaj txoj kev kos xim xim 6. Resin muaj ib co degree ntawm unsaturation thiab yuav siv tau raws li ib tug sizing tus neeg sawv cev thiab yas modifier.


C9

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