| http://www.w3.org/ns/prov#value | - section the portions attaching the tubes to one another define a generally straight line perpendicular t the longitudinal dimension of the tubes, the tubes being generally vertically stacked with respect to one another, each tube except a top tube being attached at a 0?? position to the next tube above it at the next tube's approximately 180?? position, the corrugations being defined by alternatin
|