| http://www.w3.org/ns/prov#value | - Therefore, it is desirable that the heat radiation from portions (of the polymerization reactor) contacting the materials is suppressed as much as possible, and examples of qualities of materials as favorably used therefor include such that portions (made of such as resin, rubber, and stainless steel) noncontacting the materials are covered with heat insulators or heated with a jacket.
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