单词：tempering brittleness
回火脆性
单词：tempering brittleness 相关文章
What Makes Windshield Glass So Tough? We tend to think of glass as fragilebut in fact, glass is pretty strong stuff. A flawless fiber of glass pulled lengthwise is five times stronger than steel! Although glass is quite strong, its also very brittlea
发表于:2018-12-31 / 阅读(100) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest