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współczynnik efektywności
el., econ.	facteur de participation à la pointe
energ.ind., tech.	coefficient d'efficacité calorique; rapport d'amplification
mech.eng.	coefficient d'amplification; coefficient d'efficacité calorifique; coefficient de performance

współczynnik efektywności: 4 phrases in 4 subjects

Construction	1
Energy industry	1
Statistics	1
Telegraphy	1