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magdeburg hemispheres junior high school physics teaching mechanics experiment science and education instrument atmospheric pressure general education

magdeburg hemispheres junior high school physics teaching mechanics experiment science and education instrument atmospheric pressure general education

马德堡半球初中物理教学力学实验科教仪器大气压强普教

  • EXW Price: Min. order:
    ¥59.0
    ≥2/piece
    • 2 piece
  • Exchage Rate 1 CNY ≈ 0.142 USD
  • Item No. 青华21019
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    mixed batch(混批) ¥0.0 999 piece available
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  • Description

注意：下单时需要核对交货时间（因现货时时变化）

抽气前，半球的外部压力等于其内部压力等于大气压。但抽气后，半球外部压力大于其内部压力，并且半球内部为真空。就好像大气压"压"住了两个半球。所以这两个半球必须用较大的力才能拉开。undefined

Update time：20241114140037


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