In our life, we often divide ultraviolet light into UVA, UVB and UVC.
UVA wavelength 320 ~ 420nm, also known as long wave dark spot effect of ultraviolet, it has a strong penetration, UVA can direct to the dermis of the skin, destroy elastic fibers and collagen fibers, the skin tanning. UVB wavelength 280 ~ 320nm, also known as the middle wave erythema effect of ultra...
College entrance examination refueling | shining years should dare to dream and try
shining years should dare to dream and try ...
On June 7th | the 15th Shanghai International Water Fair of Qingdao Fluorite came to a perfect close
The 3-day Shanghai International Water Show from June 5th to June 7th came to a perfect end. This international water exhibition comprehensively displays sludge disposal, wastewater evaporation, waste water equipment, village water environment, whole house/household/commercial water purification and...
Don't forget the beginner's mind Self-motivated forward | Qingdao fluorescent high-tech enterprise ce
Qingdao Fluorescent Innovation Technology Co., Ltd. was certified as a high-tech enterprise in 2022 As one of the highest honors for high-tech enterprises in China, high-tech enterprise qualification certification is a guiding policy of the state to stimulate enterprises enthusiasm for independent i...
