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.
Wā tuku: Nov-07-2022
