wide-bore tip 宽口吸头
straight bore mozzle tip 直膛水栓喷雾
bore tip
钻牛角尖
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Welding current is transferred to the wire through the contact tip whose bore is slightly greater than the wire diameter.
焊接电流通过孔径稍大于焊丝直径的接触端传送到焊丝。
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