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。
https://phds.ucmerced.edu/sites/g/files/ufvvjh1401/f/webform/complete-list-of-american-airlines-customer-service-24-7-live-person-support-numbers-a-step-by-step-guide_1.pdf
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https://www.therepublic.com/wp-content/uploads/formidable/10/complete-list-of-southwest-airlines-customer-service-contact-numbers-the-safety-service-manual.pdf
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https://www.therepublic.com/wp-content/uploads/formidable/10/24-7-Live-Person-Coinbase-Customer-Service-225-Complete-List-MY.pdf