Tshauv hlob zoo nyob hauv Europe, tshwj xeeb hauv tebchaws Poland, hauv lub foothills ntawm Alps, nyob rau ntawm ntug dej hiav txwv Baltic. Nws suav hais tias yog ib hom ntoo muaj txiaj ntsig. Muaj cov ntoo tshauv dej, lawv pom nyob rau hauv cov hav zoov uas muaj dej nyab, thiab calcareous, uas loj hlob ntawm cov limestones qhuav.
Cov Lus Qhia
Kauj ruam 1
Ntoo tau muaj nuj nqis rau nws lub zog, kav ntev, zoo nkauj, tshwj xeeb kev ntxhib los mos. Nws daim duab, tshwj xeeb tshaj yog nyob rau hauv lub ntsag, zoo li lub plhaw plaub hau. Tus ntoo belongs rau cov khoom hnyav thiab tawv tawv, nws txoj kev khoov thiab lub cev nrawm dhau ntawm lub zog ntawm ntoo qhib. Qhov ceev yog 600-700 kg / m3. Xws li cov txiaj ntsig ntawm cov tshauv ua viscosity, elasticity, resilience kuj tseem nyob hauv kev thov. Lub cub ruaj ruaj ntoo khoov tau yooj yim, tsis tawg thaum qhuav. Cov xim ntawm cov ntoo yog grayish, reddish, yellowish, nrog pom meej txhua xyoo ib ncig, tuaj yeem kho nrog dej thiab dej cawv raws li cov stains.
Kauj ruam 2
Tshauv raws li lub tuam tsev cov khoom siv tsis txaus ntseeg, nws tiv taus deformation, muaj feem cuam tshuam me me los ntawm pwm, thiab muaj cov khoom zoo tagnrho rau kev ua ntaiv. Qee cov tuam ntxhab ua lub cev ntas rau lub tsheb los ntawm nws, xav tias cov khoom no ua tiav zoo ua ke kev pom kev thiab lub zog. Xyoo tsis ntev los no, cov ntoo tshauv tau tau txais cov chaw muag khoom, cov rooj tog txaj muag tau qhia nws.
Kauj ruam 3
Ntoo siv nyob rau hauv rooj tog tsim ua khoom ntoo lossis hauv daim ntawv ntawm veneer thiab plywood. Cov headsets yog txiav nrog veneer, qhov ntsuas tau siv los sib sau ua ke cov tog hauv ncoo, xws li lub rooj zaum muaj rooj zaum lossis rooj zaum. Los ntawm cov hom ntoo no, lub rooj tsav xwm zoo hauv cov vaj huam sib luag tau txais, vim tias nws muaj qhov nqus coefficient tsawg ntawm cov dej nqus, ntxiv mus, tshauv parquet tuaj yeem tiv taus cov khoom hnyav thiab ruaj khov.
Kauj ruam 4
Lub qhov rooj, khoom siv sab hauv, vaj huam sib luag rau phab ntsa thiab qab nthab - qhov no yog cov npe tsis tiav ntawm cov khoom uas tuaj yeem ua los ntawm cov ntoo zoo. Cov khoom siv yog qhov xav tau ntawm tus kws ntoo cov khoom lag luam; lub teeb thiab ruaj khov txiav rau cov txee, qag, khiab caj dab, khawm taws, khawm qhov rai, thiab cov khoom siv kis las tau ua los ntawm nws.
Kauj ruam 5
Tshauv tseem siv rau hauv kev tig, cov kws txawj tsim kom muaj ntau yam los ntawm nws: cov khoom ua si, tais diav, khoom plig. Hauv kev lag luam aviation, cov khoom siv yog siv los ua tus kiv cua kom pom cov qauv dav hlau. Ntau lub chaw lag luam xav tau txoj kev yug menyuam no. Rau kev lag luam textile, qee qhov tshuab ua tau. Cov phom sij siv cov khoom siv los tsim ua kom muaj zog, lub teeb yuag nrog cov lus sib dhos tsawg heev.
Kauj Ruam 6
Cov ntoo tshauv yog hom kab kev, tshwj tsis yog ntoo, xyoob ntoo, hauv paus, nplooj ntawm cov ntoo muaj qhov xav tau. Cov xim dub, xim av thiab xiav tau txais los ntawm nplooj thiab tawv ntoo. Cov ntoo ntawm cov hauv paus hniav yog siv rau cov khoom siv tes ua. Nws zoo kawg nkaus polished thiab polished. Thaum uprooting lub stumps, keeb kwm yog sawed tawm, ntxuav, ntxuav ntawm cov tawv ntoo, lubricated nrog txiv qaub mis thiab qhuav.
