| http://www.w3.org/ns/prov#value | - The reactor 21 is formed in a short cylindrical form by air-tightly linking the two stainless steel reactor main members 22, 23. [0232] A recess 22 a, whose bottom surface is a plane, is provided inside one of the reactor body member 22, and a gas passage 24 a of the gas supply joint 24, which is mounted on a rear surface, is in free communication with the recess 22 a. [0233] A recess 23 a, whose
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