For slowreplacement the age distribution function assumed is unimportant.
对缓慢置换,假设的时龄分布函数变得不重要。
2
As long as the approach remains locked into replacement lamps, and products that must be replaced when they fade, the adoption into general illumination will be very slow.
The utility model is capable of protecting bicycles and preventing slow operation of elements, high replacement rate and bad impact on decorative effects caused by rust of the bicycle.