Cosco Shipping Busy with Semi-Submersibles News Feed Oil&Gas Project Cargo Shipping by Editor - 22 June 202122 June 2021 China’s first super large-sized self-propelled cutter suction dredger “Tianjing”, was this week unloaded from the deck of the 50,000-tonne semi-submersible vessel Xianghekou of Cosco Shipping