?????????? ??????????????????????????? ???????????????????????????????????????? ?????????????????????????????????????????? ??????????????????????????????????????????????????? ??????????? ?????????????????????? ????????????????????????????????????????????????????????? ???????? ???????????? ???????????????????
เพราะเหตุใดพรีคาสท์คอนกรีตสำเร็จรูปถึงนิยมนำมาสร้างโกดัง โรงงาน
??????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????????????????? ????????????