Neunkirchen, Saarland, Nọvemba 22nd, ntọala ọzụzụ mba ofesi mbụ maka ndị injinia na ndị teknụzụ nke China Concrete and Cement Products Association (nke a na-akpọ “CCPA”) - Eco-Concrete Masonry Materials and Engineers Training Base for Concrete and Cement Products Industry (Germany). Ebe) - ewepụtara......
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