Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Arabic
Bulgarian
Chinese
Czech
Danish
Dutch
French
German
Greek
Italian
Polish
Portuguese
Romanian
Russian
Spanish
Swedish
Ukrainian
+
G
o
o
g
l
e
|
Forvo
|
+
technical efficiency
This HTML5 player is not supported by your browser
econ., energ.ind.
know-how
Add
|
Report an error
|
Get short URL
