SHANGHAI, July 9 (Xinhua) -- China's deep-sea heavy-duty mining vehicle has completed sea trials at depths exceeding 4,000 meters, the Shanghai municipal government said Tuesdaybingorama.■
SHANGHAI, July 9 (Xinhua) -- China's deep-sea heavy-duty mining vehicle has completed sea trials at depths exceeding 4,000 meters, the Shanghai municipal government said Tuesdaybingorama.■