KeywordsandExpressionsChord:弦杆Jackcase:提升齿轮箱Cylinder:圆柱Truss:桁架22.1 LegsFigure22.1 Componentsofajack-upplatformlegLegsmaybeeithershelltypeortrusstype.Shelltypelegsmaybeconsideredaseitherstiffenedorunstiffenedshells.Legsmayhaveindividualfootingsormaybeatta (共 6102 字) [阅读本文] >>