The threaded rod has a threadedportion in its front end.
在螺杆已在其前端螺纹部分。
2
Is the threadedportion of the spare tailshaft well coated with paint?
备用尾轴的螺纹部分涂漆了吗？
3
Througn designing three axial slots in internal threadedportion and optimizing nib structure, a design was made on the injection mould with a two-step ejecting mechanism with non-rotating.