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useful ['ju:sf(ə)l] adj.
gen.	pożyteczny; przydatny; użyteczny; celowy pożyteczny; pomocny

useful : 31 phrases in 16 subjects

Accounting	2
Agriculture	3
Construction	2
Economics	2
Electric traction	2
Electricity generation	2
Electronics	1
Energy industry	2
Environment	2
Forestry	1
General	2
Radiology	1
Reliability	1
Thermal Energy	4
Transport	2
Vacuum tubes	2