??????????????????????? (Passivation) ?????????????????? ????????? ??????? ???????? ?????? Passivation ?????????????????????? AISI-440C ????????????????????????? ??????????????????????????????? Passivation ?????????????? (Passivation) ????????????? Treatment ????????????????????????????? ????
รู้หรือไม่ หัวพ่นไฟใช้แก๊สในอุตสาหกรรมมีกี่ชนิด
?????????????????? ???????? Burner ?????????????????? ???????????? ?????????????????????????????????? ????????????????????????? ??????? ?????????????? ???????????????????????????????????????????????????????? ?????????????????????? ?????? ????????????????? ???? ?????????????????? ??????????????? ?????????????????????????????