Video: Leej twg tsim cov tshuaj txhuam hniav?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Charles Forster tuaj nrog lub tswv yim ntawm kev tsim cov ntoo pov tseg cov hniav thaum nyob ntawm tripto rau South America, qhov uas nws pom cov neeg ib txwm siv ntoo ntoo los ntxuav lawv cov hniav.
Tom qab ntawd, ib tus tuaj yeem nug, thaum twg tus pas txhuam hniav tau tsim?
Hauv Xyoo pua 17th , cov pas txhuam hniav yog cov khoom kim heev thiab zoo li cov hniav nyiaj hniav kub, tau kos duab zoo nkauj siv cov hlau zoo nkauj thiab teeb nrog pob zeb kim. Thawj lub tshuab txhuam hniav tsim tau tsim xyoo 1869, los ntawm MarcSignorello. Lwm tus tau ua daim ntawv pov thawj xyoo 1872, los ntawm Silas Noble thiab J. P. Cooley.
Ib sab saum toj no, yuav ua li cas txhuam cov hniav? Cov txheej txheem ntawm ua a tus txhuam hniav pib nrog birch cav. Cov cav ntoo tau nqa los ntawm cov grippers mus rau hauv de-barker, uas nyob rau hauv ob kis ntawm cov hniav tsim tus du, barklesscylinder. Tom qab ntawv lub cav tau thauj mus rau hauv lub tshuab tsis siv neeg, uas yog ib daim ntawv log zoo li ntawv (1.06 hli tuab) siv 12blades.
Tom qab ntawd, lo lus nug yog, vim li cas cov txiv neej zom cov tshuaj txhuam hniav?
Ib zaug ntoo cov hniav dhau los ua muaj nyob hauv cov khw noj mov, cov neeg noj mov tau khaws lawv ntawm lawv txoj kev tawm thiab siv lawv rau lawv lub hom phiaj. Tom qab lawv tau siv los ntxuav cov hniav, cov cov hniav tau siv ntxiv Nyob rau lub sijhawm, zom a tus txhuam hniav txhua qhov chaw tau dhau los ua ib qho kev tsis txaus siab thiab kev tsis txaus siab.
Dab tsi yog cov tshuaj txhuam hniav hauv ntiaj teb?
Muaj zog, Maine yog ib zaug paub tias yog 'tus pas txhuam hniav ntawm lub ntiaj teb.' Ntawm qhov siab ntawm lawv lub koob meej thiab kev tsim khoom, Muaj zog tsim los lossis txog 20 lab tus kws kho hniav ib hnub. Tom qab Kev Tsov Rog Thoob Ntiaj Teb Zaum Ob, qhov siab ntawm Strong's WoodProducts, ntau dua 75 txhiab tus txhuam hniav ua lawv txoj hauv kev tawm ntawm tsob ntoo ib xyoos.
Pom zoo:
Koj puas tuaj yeem siv tshuaj txhuam hniav txhuam hniav ntawm qhov ncauj?
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Kuv puas tuaj yeem siv cov tshuaj txhuam hniav rau cov hniav tawg?
Yog tias qhov tawg tau ua rau lub ntsej muag ntse lossis jagged, npog nws nrog ib daim ntawm cov pos hniav los yog cov pos hniav uas tsis muaj qab zib kom nws tsis txhob txiav koj tus nplaig lossis sab hauv ntawm koj daim di ncauj lossis lub plhu. Yog tias koj yuav tsum noj, noj cov zaub mov mos thiab tsis txhob tom ntawm cov hniav tawg