Dab tsi yog lub luag haujlwm ntawm additive? Kev tsim cov khoom siv ntxiv ua si ntau lub luag haujlwm hauv kev tsim kho, suav nrog: 1. Txhim kho cov khoom: Cov khoom ntxiv tuaj yeem txhim kho cov khoom ntawm pob zeb, xws li lub zog, durability, workability, thiab teem sij hawm. 2. Hloov tus cwj pwm: Cov khoom siv ntxiv tuaj yeem hloov kho tus cwj pwm ntawm ...
Nyeem ntxiv