Negotiable
The date of payment from buyers deliver within days
Zhejiang
Long-term effective
2019-03-12 07:55
477
omter2019(Mr.)
Zhejiang
No.7, Yongxing 3rd Road, Chengdong Industrial Function Zone, Yueqing City, Zhejiang Province, China
Knob sharing
The knob is not an invention that changes the world, but it can do things that the keys can't do.
As a mechanical construction, we don’t know which device used the knob first. Maybe a telegraph machine in the last century? Or a oscilloscope? It may also be a radio or a TV later, which is naturally born on electronic devices like many buttons, and then gradually became popular as a part of the audio equipment, and has been used as a controller ever since.
http://www.joystick-knob.com/