Added ro values

For the small language fix commit I suppose "cirvulaire" should be "circulaire".

Question: For table vl_installation_type:
id 7: Chambre reducteur
id 8: Chambre coupe pression

Shouldn't they be the same? What's the difference? The "reducteur" is the device that makes the pressure reduction, and it should be inside the "chambre coupe pression". Do you have a "chambre reducteur" inside a "Chambre coupe pression".? Thanks