Xov Xwm Tuam Txhab
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Puas tuaj yeem hloov lub pob valve yog tias lub pob valve tawg?
Lub pob valve yog ib qho khoom siv tseem ceeb heev, tab sis tom qab siv lub sijhawm ntev, nws yuav tsis xav tias muaj txiaj ntsig zoo, yog li qee tus neeg yuav xav txog kev hloov lub valve core los daws qhov teeb meem.Lub pob valve puas tuaj yeem hloov pauv thaum lub pob valve tawg?Wb saib ua ke.1. Puas yog lub valve...Nyeem ntxiv
