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Social dance Essay

Dance does not leave behind clearly identifiable physical artifacts such as stone tools, hunting implements or cave paintings. It is not possible to say when dance became part of human culture. Dance ...

4 Pages, (1072 Words)
Published: 2020-04-22 08:25:56

The Inner Structure of the New Type Ball Mill Essay

Ball mill is the key equipment for grinding after the crushing process, which is widely used in the manufacture industries. The quill shaft adopts cast steel part and the liner is detachable. The turn...

2 Pages, (381 Words)
Published: 2020-02-18 06:41:11