出典:石油石炭省
出典: https://moit.gov.vn/tin-tuc/thong-bao/lay-y-kien-ve-viec-ban-hanh-thong-tu-cua-bo-truong-bo-cong-thuong-quy-dinh-mot-so-noi-dung-ky-thuat-trong-hoat-dong-dau-.html
出典: https://moit.gov.vn/tin-tuc/thong-bao/lay-y-kien-ve-viec-ban-hanh-thong-tu-cua-bo-truong-bo-cong-thuong-quy-dinh-mot-so-noi-dung-ky-thuat-trong-hoat-dong-dau-.html
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