The other end is connected to a plurality of two-way valves 12 connected to the buffering tube 14, one end is connected to one of the two-way valves 12 through the line 140 and the other end is a three-way valve block 16 The diameter of which is connected to the buffering tube 14, which is larger than the diameter of the line 140, the first end is connected to the buffering tube 12, the second end is connected to the sample and reagent supply 15, The third stage includes a heating reactor 18 including a three-way valve block 16 connected to the heating reactor 18 and an upper cap 50 in the form of an inclined downward downward from the edge to the center. It is done.
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