~λ13;F1~F2~P21;JU;FA
   4.6	CUT COMMANDS.
~JAFA
	 "X CUT <X> <Y> <Z>"	Cut Bodies, Faces and Edges.
	"αX CUT <X> <Y> <Z>"	Cut Faces and Edges.
	"βX CUT <X> <Y> <Z>"	Cut Edges.
	"εX CUT"		Kill Temporaries (Uncut).

~JUFA	The cut command  arguments specify a cutting plane  in terms
of  a vector from  the world origin;  the direction of  the vector is
normal to  the desired  plane, and the  magnitude of  the  vector is  the
distance of the origin from the desired plane.

~H2;X1.0;L0,10;*FIGCUT;I1350,0;JUFA

4.7	Parts Tree Structure - The Attach and Detach Commands.

        "A"	ATTACH
        "D"	DETACH

	The parts' tree commands "A"
attach and and "D" detach, allow  bodies to be connected into a  tree
structure without affecting  their faces, edges or  vertices. The "A"
command  links the body in the top of the stack to the body in
the second  stack position  as a  sub-part  (or child).   The  detach
command unlinks  a body from  its parent. Certain  operations such as
the  Euclidean  transformations   apply  to  a   body  and  all   its
descendents. If  the first two entities are
not bodies  then  these commands are no-operations. Because  of  the
implementation,  the   parts  structure   is  always  kept   a  tree;
circularities and incest are prevented.