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simple machinery
简单机械
人类在劳动实践中最早创造的结构简单的机械,包括杠杆、滑轮、斜面、螺旋、尖劈等。
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Journal of Traditional Chinese Medicine
Journal of triticeae crops
Journal of Urban and Regional Planning
journal of urban economics
Journal of Urban History
Journal of Vinyl&Additive Technology
Journal of Women's History
Journal of World History
Journal of Wuhan Conservatory of Music
Journal of Wuhan University of Technology—Materials Science
Journal of Xi'an Conservatory of Music
journal printing
journal published by fellows with same ideals
journals of comics
journals of engines in Chinese
journals of mechanics in Chinese
journals of wood carving
Journal to Eliza
Journety to the West for Distress Relieving
Journey from St.Petersburg to Moscow
Journey in Spring by Zhan Ziqian
journey map
Journey to a War
Journey to Longmen
Journey to Russia as an Envoy
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