• 1. double reduction gearbox: 两级减速装置 | 两级减速器 | 双级减速齿轮箱
• 2. double-reduction gearbox: 双级减速齿轮箱 | 两级减速器
• 3. double e reduction gearbox: 两级减速装置

• 1.The invention relates to a reduction gearbox of an electric tool, in particular to an assembling structure of double-speed impact electric drill gear reduction gearbox.
  本发明涉及一种电动工具的减速箱，具体地说是一种双速冲击电钻齿轮减 速箱的装配结构。
  dict.yoduao.com

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