Ib tsab xov xwm hais txog peb cov khoom raug luam tawm hauv phau ntawv xov xwm CPI (Concrete Plant International) Issue 4,2019, nplooj 162-163.
Post lub sij hawm: Aug-07-2019
Tshaj tawm tshiab
Post lub sij hawm: Aug-07-2019
Post lub sij hawm: Aug-07-2019