The Foil Electroscope is an scientific instrument that is used to detect the presence and magnitude of electric charge on a body. For recognition and understanding of electric charge in physics class.Teaching Equipment for students and kids.
1. The Small Gold Wash Plant is easy to move and can be towed by a wheel loader or excavator.2. The unique design of the screen surface allows for a larger screen capacity, longer screen life and no clogging of the material.3. Gold recovery rate can be ov
OR275 designed as an economic small fishing kayak without compromising on quality or style. Two waterproof hatches keep small items dry and built in back large storage area can put big items with the help of bungee cords.
Butterfly valve is a simple structure of the control valve, can be used for low pressure pipeline medium on/off control, butterfly valve is by closing the disc, rotating around the valve shaft to open and close the valve.