| http://www.w3.org/ns/prov#value | - That is, the optimal reaction condition varies depending of various factors such as kinds and amount ratios of a hard segment and a soft segment to be used, shapes of a device to be used, a stirring conditions and the like.The optimal reaction condition is a case, for example, where a difference obtained by comparing a melting point of the obtained polymer and a melting point of polyester used as
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