Phthal anhydride kev ua lag luam thaum lub tswv yim sawv cev!
Cov khoom lag luam ua tiav kev ua lag luam tau khiav zoo, kev lag luam naphtalalis tau raug txo qis, thiab nws yuav tsum tau ua rau muaj kev sib tw hauv nroog, thiab nws yuav tsum tau ua rau lub lag luam phlhalic
Lub sij hawm Post: Lub Yim Hli 22-2024