liushaofeng2005

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谁有EN60335-1 最新标准,发给我,谢谢,liushaofeng2005#163.com

0 赞同 2006-02-25

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0 赞同 2005-10-16

I look for this dada for a long time .would you like to sent it to me.

0 赞同 2005-10-16

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0 赞同 2005-09-05

当铜接头和碳钢在一起用银钎焊焊接时，当打开焊接表面是不是必须保持两面都要有焊料？帮帮忙呀，如果知道的话

0 赞同 2005-09-05