Skipping forwards ob peb txhiab xyoo, thiab peb tuaj yeem pom thaum thawj patent rau lub folding ntoo kauj ruam ntaiv tau los rau hauv. Daim ntawv no tau txais los ntawm ib tug txiv neej Asmeskas hu ua John H. Balsley ntawm 7th Lub Ib Hlis 1862.
Leej twg tsim tus ntaiv?
Hnub Lub Ib Hlis 7, 1862, John H. Balsley tau txais thawj patent hauv Tebchaws Meskas rau kev tsim cov kauj ruam. Nws raug suav hais tias yog tus neeg tsim khoom ntawm thawj folding ntoo kauj ruam ntaiv. Cov kauj ruam tau paub thiab siv tau ntau xyoo ua ntej 1862.
Dab tsi yog thawj ntaiv lossis ntaiv?
Lub staircase niaj hnub zoo li kev sib yuav ntawm ob hom no: architectural, tab sis cov tswv yim thiab domestic. Yog li, cov lus teb rau lo lus nug yog tias cov ntaiv tau los ua ntej, tab sis tsuas yog yuam kev thiab tsim los ntawm cov xwm txheej, tsis yog tib neeg. Zoo li ntaiv yog thawj tus tsim kom paub meej.
tus ntaiv hlob tshaj plaws hauv ntiaj teb nyob qhov twg?
tus ntaiv hlob tshaj plaws hauv ntiaj teb nyob qhov twg?
- Cov ntaiv no tsis muaj dab tsi los txham ntawm. Mount Niesen yog ib qho ntawm Swiss Alps, nyob txog plaub caug mais sab qab teb ntawm Swiss peev ntawm Bern.
- Niesen tso "kev lom zem" rov qab rau hauv "funicular."
- Thaum nyob hauv Bern, hnov qhov kub hnyiab.
- Txhua xyoo, tsuas yog tsib puas tus qhua tuaj nqa ntaiv.
Leej twg tsim nab thiab ntaiv?
Raws li qee cov keeb kwm, qhov kev ua si tau tsim los ntawm SaintGyandevnyob rau hauv lub xyoo pua 13th AD. Keeb kwm, qhov kev ua si tau siv los ua ib feem ntawm kev qhia ncaj ncees rau cov menyuam yaus. Cov squares uas ladders pib yog txhua tus yuav tsum sawv rau ib tug tsim txiaj, thiab cov vaj tse lub taub hau ntawm tus nab yuav tsum sawv rau ib tug phem.
