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Guard for indicating position extremities for rudder, stern hydroplane and propeller of submarines for military purposes and marine science exploration, has set of flat bars provided with extended arms, and set of pipes affixed on flat bars 2022-08-23
Assembly jig for welding and assembling normal blowing aft ballast tank in Scorpene submarine useful for anti-surface ship warfare, anti-submarine warfare, has vertical plates attached at top of upper circular tube, and chequered plates located at inner section of circular baseplate 2022-08-01