水垢
Scale
Deposit
incrustation
furring
Water
deposits
Incrustant
Incrustation scale
water deposit
boiler scale
water scales
Incrustaion
scale deposit
deposition
approximate equation
water fouling
Sediment
autodigestion
water scale
axial-flow blower
scaffolding
cloud
deposit of scale
crucible steel
Crust
furr