Philips invention goes on sale Light bulb lasts 20 years. IN Business.

书目详细资料
发表在:	Manila Bulletin Jan-Dec, Mon-Sat (2012).
主要作者:	Ogle, Alex
格式:	文件
语言:	English
主题:	Philips Electronics, Inc. Technological innovations > Inventions. Light bulbs > Incandescent lamps. Philips invention. LED bulb. Philips. Omni-directional bulb. Crawford, Ed.