Hloov kho cov qauv kev lag luam ntawm #pa thiab #ma
** Txiv neej Anhydride (Ma): **
Cov txiv neej anhydride lub lag luam tseem ruaj khov tab sis tau ntsib kev poob qis me ntsis. Muaj peev xwm rau cov nqi luv luv kom txo tau ntxiv.
** phthalic anhydride (PA): **
Kev ua lag luam rau phthal anhydride yuav txuas ntxiv pom kev ua haujlwm qis.
Xav tias dawb kom ncav tes rau cov ntaub ntawv ntxiv lossis nug!
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