Kev lag luam cov khoom ua si xuab zeb ntawm qhov chaw ua si

Qhov no yog peb cov xuab zeb ntawm qhov chaw ua si tsim.

Peb cov xuab zeb ntawm qhov chaw ua si siv cov khoom zoo tshaj plaws ntawm LLDPE yas.

Lub sij hawm xa khoom ntawm cov xuab zeb ntawm qhov chaw ua si yog 3 hnub rau 20 daim.

Tag nrho peb cov xuab zeb ntawm qhov chaw ua si yog rau cov menyuam yaus hnub nyoog 2-5 xyoos.