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