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English to Italian translations [PRO] Tech/Engineering - Mechanics / Mech Engineering / safety glasses
English term or phrase:shade designation
A parameter of safety glasses, sorry for the limited context:
"Welding helmets or welding shields shall be used only over primary eye protection.
Spectacles with shaded or special purpose lenses, as suitable Protection from optical radiation is directly related to filter lens density. Filter lenses shall meet the requirements for shade designation (see table following)"