目的：观察创伤膏在创面愈合中的作用。
Objective: To observe the effect of Chuangshang Gao on wound healing.
因此研究无铅锡膏在电子封装中的应用具有重要意义。
So study lead-free solder paste in the electronic application package is important.
在锡膏印刷过程中，印刷机是印刷品质控制的关键。
Screen printing equipment is the key of quality control during the printing course.
在锡膏印刷过程中，印刷机是印刷品质控制的关键。
Screen printing equipment is the key of quality control during the printing course.
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