Physics, 22.07.2021 14:00 ykluhredd

một trường học sử dụng hệ thống camera giám sát được cấp điện bằng điện lưới quốc gia để hệ thống đó có thể hoạt động liên tục cả trong điều kiện mất điện lưới thì cần ???

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một trường học sử dụng hệ thống camera giám sát được cấp điện bằng điện lưới quốc gia để hệ thống đó...

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