Notice that the third arc from the center is not filled.
请注意，从中心开始数的第三个弧未填充。
Arc stiffness and heat concentration filled wire easily, especially suitable for bicycles and other industries to fill the welding wire.
电弧挺度好，热量集中，填丝容易，特别适宜自行车等行业的填丝焊接。
Arc stiffness and heat concentration filled wire easily, especially suitable for bicycles and other industries to fill the welding wire.
电弧挺度好，热量集中，填丝容易，特别适宜自行车等行业的填丝焊接。
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