Kusindikiza ukadaulo waukadaulo gawo loyamba

Kusindikiza ukadaulo waukadaulo gawo loyamba

Pakati pa 1926 ndi 1933, woyambitsa ndi wopanga makina wa ku Denmark NielsA Christensen adakulitsanso ndikugwiritsa ntchito bwalo lamtunduwu.Njira yake (O-ring) inasindikizidwa mu 1930, yovomerezeka mu 1933, ndipo inapambana mphoto yaikulu mu 1938.

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Nthawi yotumiza: Nov-07-2022