??????????????? ??????? ? ?????????????????? ??????????????????????????????????? ?????????????????????????????????????????????????? Ethylene Glycol ??? ??? Terephthalic ?????????????????????????? ????????????? ????? ????????????????????????????????? ????????????????????????????????????????? ??????????????????????????????????????????????
บริษัทซับคอนแทรค มีความสำคัญต่อองค์กรต่างๆ อย่างไร
?????????????????????????????????????????????? ????????????????????????? ???????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????? (Subcontract) ????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????