Annotated record of the detailed examination of Mn deposits observed during a...
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Testing of a continuous bucket-line dredging system was carried out in the South Pacific August 23 through September 14, 1970 by Japan Resources Association aboard the vessel...
1970年8月23日至9月14日，日本资源协会（Japan Resources Association）在南太平洋海域的其搭载船舶上开展了连续斗式疏浚系统的测试工作……
