チューブを2重構造にすることにより耐圧力が0.7~1MPa程度まで向上させるための試作開発を進めています。順次2重構造のチューブに切替えていく予定です。
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https://www.imdb.com/list/ls4103171032/
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https://www.imdb.com/list/ls4103171032/
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https://www.imdb.com/list/ls4103171032/
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