63 items, 30 effects, lots of fun!
Author: OwnlyMe
Modified by ZwerOxotnik
Anyone can translate the mod on Crowdin. https://crowdin.com/project/factorio-mods-localization
Afaik Armor reduces damage by following formula: armor/(armor+100) = dmg reduction after resistances.
This is like RoR2 armor works, so 20 armor means 16% dmg reduction, 50 armor - 33%, 100 armor - 50%, 200 armor - 66%, 300 armor - 75% etc.