See the Romanian Yearbook:
http://www.insse.ro/cms/en/content/statistical-yearbook-2012.
After the WW 1 this territory with an important Romanian population it was correctly awarded to the Romanian people.
See the Romanian Statistical Year book at the link below.
Jiu is an important river in Romania.
For the industry of Romania see the Statistical Yearbook of Romania - 2010 at the link below.
The official language in Romania is the Romanian language; the Romanian language is the mother language for more than 93 % of the population. The Romanian language is also the most important language in the Republic of Moldova. In other countries are more than 3 000 000 Romanian language speaking people.
The Romanian people, more than 90 % from the inhabitants.
The Romanian language equivalent of Romanian is român.
Român is the Romanian equivalent of 'Romanian'. It's the form that's used to identify a 'Romanian' male. The form for a 'Romanian' female is Româncă.
I suppose that the most probable Romanian equivalent of "coil" is "bobină"; for "spring" the equivalent is : "arc" or "resort". But the words context is also important.
For the Romanian people is not important; for us it is a very dangerous and costly option.
The Romanian capital is Bucharest (București in Romanian).
You could find a list with all romanian companies here: www.firmepenet.ro