base.rea
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2 			spatial dimension
1 			number of fields
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Y 				cylinder
6 -64 1 			nelr,nel_theta,nelz
.0 .0 				x0,y0 - center of cylinder
ccccoob 				descriptors: c-cyl, o-oct, b-box (1 character + space)
.5 .6 .7 .8 1 1.1 1.2  		r0 r1 ... r_nelr
0 1 1 				theta0/2pi theta1/2pi ratio
W  ,E  ,E  ,E  ,          	bc's