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Member for
3 years 4 monthsAge: 12
Level: Grade 2
Language: Chinese
(zh)
ID: 1355500
05/09/2021
Country code: MY
Country: Malaysia
Main content: 机械 (1998666)
解释并举例以下简单机械的种类和其用途：斜面；杠杆；尖劈；齿轮；
螺旋；滑轮；轮轴。
Other contents: 简单机械
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