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English 
After the end of the Second World War in 1946, the United States formulated a "aluminum-based copper" technology policy in response to the shortage of copper resources. However, in the 1960s, the performance defects of aluminum cables caused increasingly serious hidden safety problems. With the deve
This article mainly introduces the reasons for short-circuit and fire of electric wires and preventive measures.
This article mainly introduces the disadvantages of wire connectors.
