Abbreviations

Cr = Chrome plated

Fe = Iron coating

P = Phosphated

SW = Special material

IF = Hill with special slope

IFU = Special slope at the bottom

IW = Upper stage

IWU = Lower stage

CrK = Chrome - ceramic coating

Cu = Copper plating

Mo = Molybdenum coating

N = Nitrated

Sn = Tin coating

So = Special coating