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bob注册_bob体育下载地址_bob平台  
Sn-Cu series of solder has simple composition, good supplying performance and low cost, so it is widely used for flow welding (wave welding) and dipping welding of the base board and it is suitable for acting as rosin core soft solder.    
 
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[2016/12/13 ]
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[2016/12/12 ]

 
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