Xov Xwm Tuam Txhab
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Cov keeb kwm kev txhim kho tshwj xeeb ntawm cov tsheb hluav taws xob
Thaum ntxov Lub keeb kwm ntawm hluav taws xob tsheb predates peb cov tsheb feem ntau powered los ntawm combustion engines. Leej txiv ntawm DC lub cev muaj zog, Hungarian inventor thiab engineer Jedlik Ányos, thawj zaug sim nrog electromagnetically rotating nkaus li nyob rau hauv lub laboratory nyob rau hauv 1828. American ...Nyeem ntxiv
