Understand the Hall sensor, and have basic knowledge of hardware design and test.
了解霍尔传感器，并有基本的硬件设计及测试知识。
Update Promotion test at Tseng Choi Street Community hall, Please go to Photo Album!
更新井财街统一黑带及色带考试相片，详情请到剪影区！
Update Promotion test at Tseng Choi Street Community hall, Please go to Photo Album!
更新井财街统一黑带及色带考试相片，详情请到剪影区！
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