Macrofractography
断口低倍检验, 断口宏观检验
🗣️ 情景例句
Have a safe trip!
一路平安。
Can I help?
要我帮忙吗？
The village which had seemed deserted, immediately came to life.Faces appeared at windows.
刚才还似乎空荡荡的村庄一下子活跃了起来，窗口露出了一张张面孔，