Keeb Kwm. Cov kab sib chaws nyuj niaj hnub no rau txoj kev siv tsheb tau hais tias tau tsim nws tus kheej ntau zaus ntawm Great Plains ntawm Tebchaws Meskas ib ncig 1905–1915.
Thaum twg tus neeg zov nyuj tau tsim?
Tus neeg saib xyuas nyuj muaj keeb kwm hauv Great Plains, tau tsim nws tus kheej hauv ntau qhov chaw los ntawm Texas mus rau North Dakota hauv kaum xyoo pib nyob ib puag ncig 1905 teb rau kev taw qhia ntawm ntau lub tsheb loj zuj zus hauv lub teb chaws fenced.
Leej twg tsim nyuj zov?
Nyob rau xyoo 1913, tus neeg tsim khoom muaj npe William J. Hickey lees paub qhov muaj peev xwm siv rau kev tiv thaiv nyuj, nrog lub tsheb hla Tebchaws Asmeskas, thiab tau foob patent rau nws qhov kev tsim, uas yog tshwj xeeb yog tsim los siv rau hauv txoj kev. Ob xyoos tom qab ntawd, Tebchaws Asmeskas Patent thiab Chaw Ua Lag Luam tau pom zoo patent.
Vim li cas nyuj tsis hla tus nyuj zov?
Txoj kev uas tus neeg zov nyuj ua haujlwm yog qhov no: muaj cov kav hlau uas tau muab tso rau hauv ib qho kev tsim tawm hauv qhov tob tob. … Yog lawv sim hla tus nyuj zov, ob txhais ceg yuav poob rau hauv nruab nrab ntawm cov kav dej thiab lawv yuav daig. Cov nyuj paub qhov no. Yog li lawv feem ntau tsis sim hla cov nyuj zov.
Txoj kev ua nyuj sib nraus yog dab tsi?
Ib tug nyuj-daim phiaj yog ib yam khoom siv yooj yim heev. Nws muaj ib tug series ntawm parallel tuav, tso transversely hla ib txoj kev, tshaj ib tug ntiav qhov. Qhov chaw nruab nrab ntawm cov kab ntawm cov grating yog dav txaus los pab kom cov hooves ntawm cov tsiaj mus dhau yog tias lawv sim hla lub grating.
