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simple mechanical teaching resource package primary and secondary school science teaching demonstration teaching aids

简单机械教学资源包中小学科学教学演示教具

  • EXW Price: Min. order:
    ¥650.0
    ≥100/piece
  • 100 piece
  • Exchage Rate 1 CNY ≈ 0.1419 USD
  • Weight 1.0 kg/piece
  • Item No. QGJ1610
  • size
  • Specifications
    Specifications Stock Quantity
    54*48 * 18C(54*48*18C) ¥0.0 999 piece available
    Summary 0 piece Subtotal:¥ 0 Selected ∧
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  • Description

备注:下单发货时间请联系确认(现货实时变化)

斜面;1.引課。當我們往貨車上裝貨,往往搭一塊木板,把重物搭一塊木板推上車。問題:為什麼要搭這塊木板呢?預設答案:省力。......

Update time:20231206090321


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