paigaldaja tähendus null.

fitter [fitters]▼◼◼◼noun
[UK: ˈfɪ.tə(r)] [US: ˈfɪ.tər]

layer▼◼◻◻[UK: ˈleɪə(r)] [US: ˈleɪər]

pipelayer▼◼◼◼