change pole motor 变极电动机
change-pole moter 变极电动机
change-pole motor [电] 变极电动机
Change a single-pole switch 换单极开关
change pole switch 变极开关
change pole theory 变极理论
pole change motor 换极电动机
change-pole speed-adjusting 变极调速
pole-change 极变换
·2,447,543篇论文数据，部分数据来源于NoteExpress
Scientists say the thinning ozone layer over the South Pole makes climate change take place more quickly than in other areas of the world.
VOA: special.2009.06.03
In April 2006, I led an expedition to the North Pole to raise awareness of the consequences of climate change.
UNESCO: SHSviews
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