Ntiv nplhaib tsa saw hlau zoo ib yam li lub oval duab

Lifting txoj haujlwm, feem ntau siv ellipoidal ntiv nplhaib Lifting saw, vim li cas cov duab zoo thiab tsis yog lwm tus? Ntawm no yog vim li cas lub saw saw yog daim duab no: vim li cas lub nplhaib nqa saw zoo ib yam li lub oval duab duab

Ua ntej, tsis muaj cov npoo thiab cov ces kaum ntawm qhov txuas, thiab nws yuav tsis ua rau koj ob txhais tes.

Thib ob, saum npoo ntawm txoj saw hlau nplhaib yog sib npaug, uas tuaj yeem txo cov ntim kom ntau li ntau tau thiab ua haujlwm ruaj khov.

Ntiv nplhaib tsa saw ua ib qho khoom siv tseem ceeb thiab muaj ntau yam siv tau cuam tshuam nrog kev siv ntau yam, tam sim no txoj saw Lifting tau tsiv mus rau kev coj ua tau zoo dua.