Cholecalciferol is produced by irradiation of 7-dehydrocholesterol with ultraviolet light either from the sun or from an artificial source . 胆钙化醇是7脱氢胆固醇经日光或人工来源的紫外线照射而产生的。
A boundary element modeling method for the electromagnetic field by artificial source in frequency domain with 3 - d topography 三维地形频率域人工源电磁场的边界元模拟方法
Cholecalciferol is produced by irradiation of 7 - dehydrocholesterol with ultraviolet light either from the sun or from an artificial source 胆钙化醇是7 ?脱氢胆固醇经日光或人工来源的紫外线照射而产生的。
Cholecalciferol is produced by irradiation of 7 - dehydrocholesterol with ultraviolet light either from the sun or from an artificial source 胆钙化醇是7 脱氢胆固醇经日光或人工来源的紫外线照射而产生的。
Measurement and assessment of personal exposures to incoherent optical radiation - visible and infrared radiation emitted by artificial sources in the workplace 暴露在非干涉光辐射中的人体测量和评定.工作场所中人工源放射的紫外线辐射