Steinmetz solid

In geometry , the Steinmetz solid is the solid body generated by the intersection of two or three cylinders of equal radius at right angles. It is named after Charles Proteus Steinmetz , though these solids were known long before Steinmetz studied them.

If two cylinders are intersected, the overlap is called a bicylinder or mouhefanggai ( Chinese for two square umbrellas, [ 1 ] written in Chinese as 牟合方蓋). If three cylinders are intersected, then the overlap is called a tricylinder .