Time：
2018
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01
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24
s the use of non-conductive material to isolate or wrap the live body to protect against electric shock. Generally refers to a material that blocks thermal, electrical, or acoustic passage, and is used as an insulating, non-conductive material. Cut off the current so that it cannot pass through. Insulation can be generally divided into gas insulation, liquid insulation, and solid insulation. In practical applications, solid insulation is still the most widely used and most reliable insulator. Ma...