????????????????????? ??? ????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????????????????? ????????????????????? ?????????????????????? ????????????????????????????????????????????????????????????????????????????????? ????????????????????????
สายรัดโพลีเอสเตอร์ทำมาจากอะไร ?
??????????????? ??????? ? ?????????????????? ??????????????????????????????????? ?????????????????????????????????????????????????? Ethylene Glycol ??? ??? Terephthalic ?????????????????????????? ????????????? ????? ????????????????????????????????? ????????????????????????????????????????? ??????????????????????????????????????????????
สปริงกด คืออะไร
??????? ?????????????????????? ??????????????? ??? ?????? ????? ????? ???????????? ??????? ? ??????? (Copression Spring) ???? ???????? ?????????????????????????????????????? ????? ?????? ????????? ?????? ?????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????
อุปกรณ์ระบบหล่อลื่นเครื่องจักรในโรงงาน สำคัญอย่างไร
??????????????????????????????????????????????????????? ???????????????????????????????????????? ??????????? ????????????????????????? ??????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????? ????????????????????? ?????????????????????????????????????????????????????? ??????????????????