But the simple fact is that coming up with a truly worthy LED bulb is enormously complex, requiring expertise in physics, chemistry, optics, design, and manufacturing.
实际上，做一个货真价实的LED灯管是相当复杂的，需要有精通物理、化学、光学、设计和制造的专业人才。
2
Students of chemical technology learn the skills they need to support chemical research and manufacturing. They study everything from chemistry and math to equipment use and lab research methods.
化工技术专业学习化学研究和制造所需的基本技能，课程包括数学，设备使用和实验室研究方法等。
3
We are a French company, manufacturing stainless products in different domains, such as food, cometics. bio-pharm. wine and chemistry.