Railway Tunnel with China's Biggest Cross Section Completed in NW China

توضیحات:

A railway tunnel with the largest cross sectional area in China was completed Tuesday in the country’s northwest Gansu Province after more than seven years o...

لغات کلیدی:

CCTV, News, Railway Tunnel, China, Cross Section, Gansu, Contruction

درباره ما | تماس با ما | قوانین تخته سفید