| http://www.w3.org/ns/prov#value | - As shown in FIG. 2, each heat shield 6 is formed by a plurality of substantially rectangular (strip-shaped) graphite sheets 6 a disposed close to each other with a gap therebetween, such as to yield substantially a cylindrical form as a whole, whereas the neighboring heat shields 6 are disposed such that their gaps would not overlap radially.
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