Does the strong magnetic ceiling lamp require screws?
Screws have an important task in industry. As long as there is industry on earth, the function of a screw is always important.
. A screw is a general term for fasteners. Screw for daily life indispensable necessities such as: industrial cameras, watches, glasses, small electronics use screws; screws general TV, electrical products, instruments, furniture etc.; as for engineering, construction, bridges using large screws and nuts; transportation equipment, aircraft, automobile, tram is the size of screw
A screw is a tool for fastening the parts of a machine step by step by using the physics and mathematical principles of the object's bevel, round, rotary, and frictional forces.
Light plate refers to the LED chip substrate, when installing, pay attention to do not destroy the original insulation state of the circuit.
Screw is a common invention in the production and life of people for thousands of years. According to the application field, it is the first invention of human being.
