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