世界万象

World

2021-09-06 15:25:25 浏览量:81821

张春玉的专利发明

The inventor of "pliers for preventing deformation and fracture at the joint" is Zhang Chunyu. It can be proved by ZL - 2016 2031991109 Chinese utility model patent certificate.



2021-09-06 08:48:09 浏览量:92890

开学季 周群波老师辞职了

开学季 周群波老师辞职了At the beginning of school season, teacher Zhou qunbo resigned On one side is the palace of knowledge, poetry and distance On one side is a small family that can't afford it