By Grouping Method的意思|示意

采用成组试验法 The surface contact fatigue strength of medium hard gears of vanadium-titanium nodular cast iron was studied by Grouping method. A great number of data for this type of gears were first obtained in the world. The reliablity-fatigue curves of the gears were drawn as well, which provide the basis for the reliablity design of gears.