一接头，设置在上述芯线及包覆层的首端与电源的供电线的连接处，用以包覆所述的铜绞合线与电源的供电线的电气连接的塑料罩壳。
A joint. It is set at the connection of the cover head of core with power supply wire to cover the plastic casing of electric connection of copper strand and power supply wire.
线、绳、索、缆，不论是否编织或编结而成，也不论是否用橡胶或塑料浸渍、涂布、包覆或套裹。
Twine, cordage, ropes and cables, whether or not plaited or braided and whether or not impregnated, coated, covered or sheathed with rubber or plastics.
钢芯线预热温度和铜液温度的升高使包覆比下降，重熔时间缩短。
The increase of the preheating and liquid copper temperature of copper clad steel wires makes the cladding ratio down and the remelting time short.
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