TCDD Xaiv J&R Txhawm rau muab ob peb txhiab Txoj Kev Kub Ntxhov Thaum Muaj Xwm Ceev (ERT) Xov Tooj Thiab Xov Tooj Tswj Txheej Txheem Rau Railway Project Installation hauv Qaib Cov Txwv.

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