??????????????????????????????????????????????????????? ??????????????????? ??????????????????????????????????????????????????????????????????????? ???????????????????????????????????????????? ?????????????????????????????????????? ??? ???????????? ?????????? ????????????? ?????????? ??????????????????? ????????????????????? ???????????
ตลับลูกปืนในกลุ่มอุตสาหกรรมต่างๆ มีบทบาทสำคัญอย่างไร
?????????? (Bearing) ???? ?????? ??????????????????????????????????????????????????????????????????????? ????????? ?????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????? ???????????????????????????????? ?????????????????????????????????????????????? ??????????????