Description: assignment of a device to a group of similar kinds of devices based on their characteristics; Name: Item type
Description: Characteristic to differentiate between different products of a product family or special variants; Name: Product type
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