In a vacuum system, the vacuum system components used to change the direction of the gas flow, adjust the amount of gas flow, and cut or close the line are called vacuum valves.
Usb Microscope Camera ,Usb Microscope 1000X,Microscope Digital 1600X,Usb Microscope Linux
Ningbo Beilun Kalinu Optoelectronic Technology Co.,Ltd , https://www.yxmicroscope.com