&place section =  0,   "", "sdef" /
&place section = 2.0,  "", "sdef" /

&place section =  0,   "", "x_wall:sdef" /
&place section = 3.0,  "", "x_wall:sdef" /



&shape_def
  name = "sdef"
  v(1) =    0.01,    0.01
/


&subchamber_branch
	subchamber_name = 'x_wall'
	branch_name = 'b1'
/