Cov Khoom Siv Kev Ua Si Ntaus Cov Khoom Siv

Muaj pes tsawg leeg thiab cov khoom siv

Cov tshuaj kis las kis las phais cov khoom siv, cov khoom siv ntawm cov hlau, thiab cov khoom siv tshuaj txhuam, ntawm cov khoom siv ntawm cov hlau txhad yuav tsum ua raws li yy /0294-1 Cov Qauv .

Siv txoj kev thiab qhia tau

Cov twj paj nruag no tsuas yog siv rau kev cog lus thaum phais, xws li yog tsim kev phais mob hnyav, xws li kho cov kev ua si sib tsoo, xws li kev phais mob kis las, xws li kho cov pob ncaws pob ua kom zoo nkauj

Cov Khoom Siv Delta tau raug tsim cov tshuaj kho mob thiab cov khoom siv tshuaj kho mob thiab cov neeg tau txais kev loj hlob sai}