CROWNTECH, INC., headquartered in Pennsylvania, USA, and has offices in Beijing. For the global

professional optical photoelectric laboratory provides high accuracy of the equipment is used for

product testing, quality supervision, scientific research and other measuring solution. Quantum

efficiency of solar cell testing system of my company (integration), the sun simulator and the IV

test system, and other products, are widely used in new energy industry, chemical industry,

scientific research, etc.

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