?????????????????????????????? ???? ????????????????????????????????????? ????????????????????? PM2.5 ????????????????????? ????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????? ????????????? ???????????????????????????????????????????
ฟิล์มหด (Shrink Roll) กับฟิล์มยืด (Stretch Film) เเตกต่างกันอย่างไร
????????????????????? ??????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????? ????????????????????? ???????????????????????????????? ????????????????????????? ?????????????????????????? ??????????????????? ???????????????????????????? ???