https://storage-vnportal.vnpt.vn/nbh-ubnd/2433/anh/cong-van-so-cong-thuong.pdf
https://storage-vnportal.vnpt.vn/nbh-ubnd/2433/anh/cong-van-thu-cong-my-nghe.pdf
https://storage-vnportal.vnpt.vn/nbh-ubnd/2433/anh/the-le-cuoc-thi.pdf
https://storage-vnportal.vnpt.vn/nbh-ubnd/2433/anh/thu-moi.pdf
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