Method for packing with catalyst for {HEAD ~ synthesis} of {TAIL ~ unsaturated aldehyde} and unsaturated carboxylic acid 
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Method for packing with catalyst for { HEAD ~ synthesis } of { TAIL ~ unsaturated aldehyde } and unsaturated carboxylic acid
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH