Description: guideline for determining conformity; Name: declaration of conformity 
Description: guideline, stipulation or legislation used for determining conformity; Name: guideline for confirmity declaration
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