????????????? ???????????? (Projector Screen) ????????????????????????????????????????????????????????? ??????????????? ??????????? ??????????????????????????????????????? ???????????????? ???????????????? projector ????????????? ??????? ?????????????? ??????????????????????????????????? ????????? ?????????????????
สาระน่ารู้เกี่ยวกับรอกไฟฟ้า
??????????????? ???????????? ???? S ???????? ??? ?????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????? ?????????????????????? ??? ???????????? ?????????????????????????? ?????????????????????????????????????????? ?????????????????????????????????????????? ????
สาระน่ารู้เกี่ยวกับรอกไฟฟ้า
??????????????? ???????????? ???? S ???????? ??? ?????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????? ?????????????????????? ??? ???????????? ?????????????????????????? ?????????????????????????????????????????? ?????????????????????????????????????????? ????
Knurled Nuts อุปกรณ์ขนาดเล็กที่มีความสำคัญในงานช่าง
Knurled Nuts ?????????????????????????? ??????????? ??????????????????? ???????????????????????????????? ??????????? ????????????? ?????????????????????? ??????????????????????????????????????? Knurling ?????????????????????????????????????????????????? ???? ???????????????????????? ?????? ????????????? ?????????????????????????????? ?????????? ???