When the shaped catalyst and the auxiliary packing material each have a ring shape or a Raschig ring shape, the bulk volumes thereof are each a volume of {HEAD ~ a cylinder} defined by {TAIL ~ the circumferential side wall} 
defined by
When the shaped catalyst and the auxiliary packing material each have a ring shape or a Raschig ring shape , the bulk volumes thereof are each a volume of { HEAD ~ a cylinder } defined by { TAIL ~ the circumferential side wall }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL