{TAIL ~ The first reaction unit} is set to a temperature higher than that of the second reaction unit, and {HEAD ~ the first region} has a higher reflectivity than that of the second region, with respect to a heat ray that is radiated from the reaction device main body 
{ TAIL ~ The first reaction unit } is set to a temperature higher than that of the second reaction unit , and { HEAD ~ the first region } has a higher reflectivity than that of the second region , with respect to a heat ray that is radiated from the reaction device main body
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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