"technology" . "AIP (Air-independent Propulsion)" . "submarines" . "AIP stirling propulsion" . "AIP-solutions" . "air-independent propulsion" . . "AIP MESMA" . "AIP technology" . "air-independent" . "Air-independent propulsion" . "air-independent propulsion (AIP)" . "AIP-driven" . "Walter propulsion system" . "air-independent-propulsion" . . "fueled with hydrogen peroxide" . "MESMA system" . "Air-independent propulsion" . "air\u2013independent" . "Closed cycle engine SSX" . "air\u2013independent propulsion" . "Air-independent propulsion (AIP)" . . . "AIP" . "Stirling AIP System" . "closed-cycle diesel" . "air independent engine" . "closed-cycle diesel engines" . "Stirling AIP" . "AIP solutions" . "air independent propulsion" . "air-independent power (AIP)" .