????? ????????????????????? ???? ?????? ???????????????????????????????? ????????????????????? ???? ?????? ????????????????????????????????????????????????? ??????????????????????????????????????????????????????????? ?????????????????? ???????? ????????????????????????????????????????????????????
สาระน่ารู้เกี่ยวกับรอกไฟฟ้า
??????????????? ???????????? ???? S ???????? ??? ?????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????? ?????????????????????? ??? ???????????? ?????????????????????????? ?????????????????????????????????????????? ?????????????????????????????????????????? ????
เพราะเหตุใดพรีคาสท์คอนกรีตสำเร็จรูปถึงนิยมนำมาสร้างโกดัง โรงงาน
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ทำไมต้องใช้ กอนโดล่า ?
??????????? ???????? ? ???????????? ???? ???????? (Gondola) ?????????????????????????????????????? ???????? ???? ???????????????????? ????????????-?????????? ???? ??????????????? ??? ????????????????????????????????? ???????????????????????????????????????????? ???????????????????????????????? ??????????????????????????? ? ???? ?????