在全球生产链中，各国面临双重挑战，即不仅要为出口物资和零部件，也要为进口物资和零部件保持一个高效的生产链。
In global production chains, countries face a double challenge of maintaining an efficient chain not just for exports but also for imported inputs and components.
应采用双重绝缘或加强绝缘将由保护阻抗连接的各个部件隔开。
Parts connected by protective impedance shall be separated by double insulation or reinforced insulation.
5和22.36：金属部件通常不要求用双重或加强绝缘与带电部件隔开（美国）。
35 and 22.36: Metal parts are generally not required to be separated by double or reinforced insulation (USA).
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