As for rps principle and mmc of mmc principle , sufficient condition was given . then , based on offset model , virtual boundary demand , condition tolerance , iso standard and national standard , soft gauge for single cylindrical feature , two cylindrical feature , compound location tolerance and several cylindrical feature were given 然后,在漂移模型、虛擬邊界要求、條件公差理論以及iso和國家標準的公差原則基礎(chǔ)上,給出可用于單軸孔要素、雙軸孔要素、復合位置度公差、多軸孔等復雜情況下裝配可行性分析的軟件量規(guī)數(shù)學等效式。