If you depend on it, it's wise to run a small test during installation or initialization to make sure it works correctly.
如果您依赖它，那么在安装或初始化期间运行小测试来确保它能正确工作，这样做将是明智的。
A new multi-circuit test pens has simple structure, easy installation, small size and easy to carry, strong function and versatile.
新型多用途电路测试笔，结构简单、安装调试容易，体积小巧，携带方便，功能强、用途广泛。
A new multi-circuit test pens has simple structure, easy installation, small size and easy to carry, strong function and versatile.
新型多用途电路测试笔，结构简单、安装调试容易，体积小巧，携带方便，功能强、用途广泛。
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