In the electrical and electronic fields, Pb-Sn solder which is used to connect parts in the product manufacturing process can cause environmental pollution, which has drawn increasing attention.

在电子电器领域，产品制造过程零配件之间连接导通工艺中的铅锡焊料所引起的环境污染越来越引起人们的重视。

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All of the three solder pastes could form plump and splendid solder point, and the appearance of Sn-Pb solder point was more regular and sleek.

三种焊锡膏均可形成饱满、光亮的焊点，锡铅焊点外观比无铅焊点更规整圆滑。

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