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電力工作安全不容忽視 - hkprinters.orgmedia.hkprinters.org/HKPM-84/HKPM84-Trend7.pdf · 火警及爆炸 火警及爆炸可由電流通過時所產生的熱力所引 起,這些熱力足以點燃易燃物品、液體或氣體。
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