PVA hauv Skin Care Polyvinyl cawv (PVA) tsis yog siv rau hauv cov khoom siv tawv nqaij. Thaum PVA muaj ntau yam kev lag luam thiab kev siv kho mob, nws tsis yog feem ntau pom nyob rau hauv cov tshuaj pleev ib ce, tshwj xeeb tshaj yog cov tsim rau kev tu tawv nqaij. Cov khoom siv tawv nqaij feem ntau tsom rau cov khoom xyaw uas muaj kev nyab xeeb ...
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