Rail Fastening System Evolution
Kev hloov pauv ntawm txoj kev tsheb ciav hlau tuaj yeem raug txiav txim siab hla tsib theem: pib nrog kev siv cov ntoo ntsia hlau thiab cov neeg pw tsaug zog kho los ntawm pegs lossis rau tes; nce mus rau qhov kev taw qhia ntawm cam khwb cia hlau rails nrog kev txhawb nqa nyob rau hauv lub xyoo pua 18th, nrog rau txoj kev loj hlob ntawm flanged thiab ntses-bellied rails; ua raws li qhov tshwm sim ntawm dov T-shaped rails nyob rau hauv 1820s, pib ruaj los ntawm hlau wedges thiab tom qab ntawd ncaj qha rau cov neeg pw tsaug zog nrog rau tes; Kev nce qib ntxiv suav nrog kev tsim kho tshiab xws li cov rooj zaum hlau cam khwb cia, cov tsav tsheb loj, thiab ntau yam khoom siv fastening xws li aub spikes, ntsia hlau spikes, fang bolts, thiab caij nplooj ntoos hlav spikes; culminating nyob rau hauv kev saws me nyuam ntawm khi daim hlau ua ntej 1900, uas nthuav cov kabmob cheeb tsam thiab ruaj ntseg rails zoo dua, kos ib tug tseem ceeb lub sij hawm nyob rau hauv rail fastening technology.
