http://www.bjut-ise.com/articles/1999-%B8%DF%D0%A7%B5%CD%B3%C9%B1%BE%BA%B8%BD%D3%BC%BC%CA%F5%D4%DA%BB%AF%B9%A4%CA%AF%BB%AF%D0%D0%D2%B5%D6%D0%B5%C4%D3%A6%D3%C3.pdf
前者里面有助焊剂,后者没有.
http://www.bjut-ise.com/articles/1999-%B8%DF%D0%A7%B5%CD%B3%C9%B1%BE%BA%B8%BD%D3%BC%BC%CA%F5%D4%DA%BB%AF%B9%A4%CA%AF%BB%AF%D0%D0%D2%B5%D6%D0%B5%C4%D3%A6%D3%C3.pdf
前者里面有助焊剂,后者没有.