เสาเข็มเจาะแห้ง: วิธี ก่อสร้าง ที่รวดเร็วและคุ้มค่า
??????????????? ????/???????/??? ??????/????/????????? ??????????? ???/???????????/??????? ??/??????/????? ????????????????????? ???/????/?????? ??? ???????/?????????????/???????????????????. ??????? ???/???/????? ???????????????????????? ?????????/????????/?????????????? ??????/???????/????? ??????