升温幅度较小，制品表面的溶接痕只能得到减轻而无法消除。
The margin of temperature rising is very small. As a result, the welding traces on product surfaces can be alleviated rather than removed thoroughly.
升温幅度较小，制品表面的溶接痕只能得到减轻而无法消除。
The margin of temperature rising is very small. As a result, the welding traces on product surfaces can be alleviated rather than removed thoroughly.
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