| tubular concrete structures • pressure resistance • yook3.com |

| tubular structures 500m | spherical structures 1000m | ocean colonization technology | New-Atlantis™ | concrete pressure vessel | submarine yacht |

http://nautilusmaker.com/t/construction-activities-during-the-21st-century-will-be-dominated-by-concrete-sea-structures-p-k-mehta/4512