“patent of invention”可以造什么句，patent of invention造句
来源：语文精选馆 1.2W
The practical application shows that the system is safe and reliable, and has high illumination intensity and long service-life. The system has been applied for the patent of invention.
6 patent of invention on main element-heater, Aluminium Die Casting, No creepage, anti-scale, heating efficiency is more than 99.97%.
