初尝黑人嗷嗷叫中文字幕,日韩精品一区二区三区色欲AV,人妻互换精品一区二区,大波妺AV网站影院

The laser marking machine is used to mark the surface of the jade pendant. The jade pendant will not generate internal stress after marking, which ensures the original accuracy of the jade pendant. The marking pattern is fine, clear, durable and beautiful. The minimum line width can be up to 0.01mm, which can mark a lot of content on the delicate and small jade pendant.