防护系数 meaning in English

protection factor

Admixtures . curing products for concrete and mortar . determination of protective coefficient
添加剂.混凝土和砂浆用养护产品.防护系数测定
Used for testing textile ' s ultraviolet transmittance and anti - ultraviolet performance and anti - ultraviolet coefficient
用于测定纺织品紫外线透过率和防紫外线性能及紫外线防护系数。
The symposium , titled new developments in sun protection - from spf towards ipf , addressed the recent research showing that damage from various types of uvr - including uva and uvb - - may be even more harmful to the skin ' s immune system than previously considered
这场以“日光防护的科学新进展-从防晒系数( spf )到免疫防护系数( ipf ) ”为题的研讨会，将揭示由多种紫外线辐射，包括uva （长波紫外线）和uvb （中波紫外线），对皮肤免疫系统造成的伤害，这些伤害比以往想象的更为严重。