Te whakawhanaketanga hangarau hiri te wahanga tuatahi

Te whakawhanaketanga hangarau hiri te wahanga tuatahi

I waenganui i te tau 1926 me te 1933, ko NielsA Christensen te kaihanga me te kaihanga miihini a NielsA Christensen i whakawhanake i tenei momo porowhita.I taia tana tikanga (O-ring) i te tau 1930, i patentia i te tau 1933, a i riro i te taonga nui i te tau 1938.

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Wā tuku: Nov-07-2022