polymetallic nodule mining的意思|示意

Air lift is one of the most prospective lift methods in deep sea polymetallic nodule mining.

气力提升是大洋锰结核开采的主要扬矿方法之一。

This paper is of important literature value and practical importance to the ocean polymetallic nodule mining in China's mine area.

文章对中国大洋多金属结核矿产资源的开发，有着重要的文献价值和实用意义。

In some foreign countries, it is more than 20 years since the study on technology for deepsea polymetallic nodule mining has been conducted, and many results have been achieved in this field.

国外在深海多金属结核开采技术研究这一领域中开展研究工作历时20余年，取得了许多成果。