短语词组短语three spot resistance welder 三点焊机laser spot -welder 激光点焊机micro spot -welder 微型点焊机spot melting welder 点熔接机spot -welder and solderer 点焊及焊接机spot resistance welder 点电阻焊机工;现货电阻焊工;点电阻焊接工bench type spot -welder 台式点焊机 返回 spot welder