人人妻在人人,丰满尤物贵妇颤抖潮喷,AV无码一区二区三区鸳鸯影院,国产综合色香蕉精品五夜婷

On July 21, 2021, the "Zhiyuan" intelligent CSD designed by Shanghai Hansail  for the national engineering reserch center dredging was successfully launched in Shanghai Caozhen Shipyard, Hansail General Manager Sun Qingsong and Chief Engineer Shao Min attended the launching ceremony.

The total length of the Zhiyuan is about 29.9m, the width is 7.3m, the diameter of the suction and discharge pipe is 300mm, and the maximum dredging depth is 6m. Its main working mode is unmanned operation in the ship's cab, remote remote dredging operations at the shore end, fully automatic control function of "one-key dredging", and operation in inland river B-level navigation areas.