The utility model has the advantages of simple structure, reasonable design and convenient operation. The efficiency of the manual spiral tool is increased by 4 times.
本实用新型的结构简单、设计合理、使用方便、使手工旋具的效率提高了4倍。
I built a test tool to measure the spiral pattern of different species of trees.
我制作了一个测试工具来测量不同种类的树木的螺旋布局模式。
So the paper not only seems useful to deep-sea cobalt crust mining, but also offers a new design method and powerful tool for traditional spiral drum cutting head's parameters designing.
因此，本论文不仅对开发大洋钴结壳等矿产资源具有十分重要的意义，同时它也为传统的螺旋滚筒式采矿头参数设计提供了一种新的设计方法和有力的手段。
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