Time：2015.12.29
1. What is light?
The light emitted from the light emitter (source) out of the electromagnetic wave. Visible light is electromagnetic waves that can be perceived by the human e…
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Time：2015.12.29
1, viscous
Winding printed ink layer is attached to a contact surface (usually on the back of the film), thereby preventing the occurre…
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Time：2015.12.29
Examples of failure
phenomenon
the reason
Method of exclusion
1. increase the …
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