1. Among solder (alloy of lead and tin), lead and tin, which one is the hardest? which one is the softest?
2. Which one has the highest melting point? Which one has the lowest melting point?
收錄日期: 2021-04-19 20:55:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091225000051KK00464