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://quarterdeck.commanderbond.net/t/full-list-of-united-airlines-customer-service-in-usa-a-stepbystep-easyguide/3414
https://quarterdeck.commanderbond.net/t/complete-list-of-american-airlines-customer-service-in-usa-a-stepbystep-easyguide/3416
https://quarterdeck.commanderbond.net/t/complete-list-of-priceline-customer-service-in-usa-a-stepbystep-easyguide/3418