| 摘要 |
A circuit board includes a number of orifices, a number of conductors engaged in the orifices of the circuit board and each having an aperture, and an insulating layer applied onto the conductors for preventing a weld metal material from being attached onto the conductors. One or more couplers each includes a bar for securing the prongs together. The weld metal material may be prevented from being applied between the bar and the conductors, for preventing the coupler from being separated from the conductors, and for preventing the prongs from being shortaged.
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