SHANGHAImajesticmegawaysgold, 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 Tuesdaymajesticmegawaysgold.■
majesticmegawaysgold|China's deep-sea heavy-duty mining vehicle reaches record depth in sea trials
