??????????????????????????? ????????????????           ???????????????? (Bearing Units) ??????????????????? NTN ?????????? ????????????????????????????????? ???????????????????????????????????????????????????? (High-Grade Cast Iron) ??????????????????????????? (Press Steel) ???????????????????????????????????

??????????????????????????? ????????????????           ???????????????? (Bearing Units) ??????????????????? NTN ?????????? ????????????????????????????????? ???????????????????????????????????????????????????? (High-Grade Cast Iron) ??????????????????????????? (Press Steel) ???????????????????????????????????

??????????????????????????? ????????????????           ???????????????? (Bearing Units) ??????????????????? NTN ?????????? ????????????????????????????????? ???????????????????????????????????????????????????? (High-Grade Cast Iron) ??????????????????????????? (Press Steel) ???????????????????????????????????

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หลอด Preform คืออะไร หลอดพรีฟอร์ม หรือหลอด Preform เป็นพลาสติกตั้งต้นชนà¸