Oil production is separated into three phases: primary, secondary and tertiary, which is also known as Enhanced Oil Recovery (EOR). Primary oil recovery is limited to hydrocarbons that naturally ...

Secondary agricultural goods are treated products and preparations from primary agricultural goods. Together, these form the main definition of agricultural goods. Tertiary agricultural goods are ...

and in all levels of education no later than 2015 The developing countries as a whole have achieved the target to eliminate gender disparity in primary, secondary and tertiary education.

and the secondary colours close secondary coloursGreen, orange and purple. These colours can be made mixing the primary colours together.. The tertiary colours in the colour wheel sit between a ...

All industry is made up of four sectors that are a linked together like a chain: primary, secondary, tertiary and quaternary industry. Industries in the primary and secondary sectors are the ...

including primary, secondary and tertiary care respiratory specialists, respiratory physiotherapists, dieticians and nurses. Contributions come from clinicians and academics working within any ...