Description: Documents that apply to a specific region; Name: assignment of the document to a contry/region
Description: documents which are considered for usage in a certain region; Name: country/region classification of document
Description: Speed that characterizes a pump in terms of its speed, flow rate per impeller eye, i.e. total flow for single-flow impeller, half flow for double-flow impeller, at the best efficiency point and head per stage at maximum impeller diameter ; Name: Specific speed