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Refractory fiber structures
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Didier-Werke AG
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Axel Eschner
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Issue date Jun 7, 1994
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Matsushita Electric Industrial Co., Ltd.
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Minoru Yoshinaka
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Soundproofing materials
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Issue date Nov 17, 1992
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Matsushita Electric Industrial Co.Ltd.
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Minoru Yoshinaka
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