作者: Klausdieter Schippl
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摘要: A spacer block (3) for an elongated substrate (1) on the inside of tube (2) comprises internal ring (3a) which surrounds material, external (3b) is surrounded by (2), where outside diameter smaller than (3b), and (3a, 3b) are interconnected at least three spoke-type elements (3c) made fiber uniformly spaced around circumference.