Tshaj plaws, lub saw saw yog thawj tsim los pab kev yug menyuam - yog, koj nyeem qhov raug. Ua ntej qhov kev phais mob tau ua ib qho kev xyaum, tag nrho cov fetuses yuav tsum dhau los ntawm txoj kev yug me nyuam. … Txhawm rau ua kom cov txheej txheem yooj yim dua, ob Scots kws phais neeg tsim lub saw saw nyob rau xyoo pua 18th.
Vim li cas chainsaw tsim rau kev yug menyuam?
Cov txheej txheem yog thawj zaug ua los ntawm tes siv riam me me thiab pom kom tshem cov pob txha. … Ob tug kws kho mob tau tsim lub saw saw hauv xyoo 1780 kom tshem tawm cov pob txha hauv plab kom yooj yim dua thiab siv sijhawm tsawg dua thaum yug menyuam.
Thaum twg thawj chainsaw tau tsim?
thawj chainsaw yog tsim los ntawm German orthopaedist Bernhard Heine hauv 1830. Nws hu ua osteotome, los ntawm Greek osteo (pob txha) thiab tome los yog tomi (txiav); lus, tus pob txha. Lub chainsaw no, nrog rau ntau tus ua raws, tau siv rau kev kho mob.
Tus saws saws puas tuaj yeem hla pob txha?
Cov pob txha yuav tawv me ntsis, tab sis lawv nruj thiab chainsaw yuav muaj peev xwm txiav hla lawv yam tsis muaj teeb meem ntau- txawm tias nws yuav dull cov hniav ntau dua li ntoo.
Puas yog saws saws hlais pob zeb diamond?
Siv cov pob zeb diamond-coated saw hniav, pob zeb saw saw tuaj yeemtxiav los ntawm cov khoom siv nyuaj tshaj plawsrau txhua yam kev tsim kho, xws lichoj abutments, elevated structures, dams, chaw nres tsheb, foundations, thiab lwm yam.
