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