Cov khoom siv ntawmthawv pem tebyog tropical hardwood.Vim nws cov tsos zoo dua thiab qhov muag pom xim, nws muaj ob peb qhov tsis xws luag thiab ntom ntom ntom.Tau ntau xyoo lawm, nws tau dhau los ua qhov nyiam ntawm cov khoom siv hauv tsev.Lub thawv hauv pem teb feem ntau yog siv cov ntoo tawv ntoo no ua cov khoom siv raw.Yog li ntawd, nws yog hlub los ntawm feem ntau cov tswv lub thawv.Cov hniav feem ntau yog clones los ntawm Southeast Asia, vim li cas?Feem ntau vim hais tias cov tsiaj muaj ob peb yam xws li knotholes, tuag knots, wormholes, rot thiab tawg.Cov khoom siv tawm los yog siab heev, thiab nws muaj cov khoom siv zoo.
Lub thawv hauv pem teb muaj qhov tshwj xeeb zoo li lub thawv hauv pem teb.Muaj ntau hom ntoo, thiab cov peev txheej tuaj yeem tau txais hauv zos hauv ntau qhov chaw, thiab nws yog ib qho yooj yim los tsim cov saw hlau.Rau tam sim no thawv xyoob pem teb, qhov zoo ntawm lub thawv ntoo pem teb yog qhov tshwj xeeb tshaj yog pom tseeb.Tsuas yog qhov chaw nrog ntoo tuaj yeem ua cov thawv ntoo hauv tsev ntawm qhov chaw.Pib los ntawm thawj cov txheej txheem ntawm cov khoom ntim hauv pem teb raw khoom, kev tswj xyuas nruj kom ntseeg tau tias cov neeg siv khoom siv tau nrog kev thaj yeeb nyab xeeb.
Los ntawm qhov kev xav ntawm tag nrho cov qauv ntawm lub thawv ntim khoom qhuav (lub thawv).Lub ntsiab ncej yog ua los ntawm cov hlau, nrog rau cov hlau phaj ua cov khoom tseem ceeb ntawm tsib sab, thiab hauv qab yog ua los ntawm cov kab ntev thiab kab rov tav sib phim nrog ntoo.Tag nrho kev sib xyaw ua ke ntawm rigidity thiab yoog raws kom tsis txhob muaj kev cuam tshuam nyuaj ntawm tag nrho cov hlau.
Los ntawm lub cev khoom ntawm ntoo nws tus kheej.Lub modulus ntawm elasticity ntawm cov plag tsev ntoo muaj zog dua li cov hlau.Tom qab cov khoom hnyav dhau los ntawm cov ntoo hauv pem teb ntawm lub thawv, lub phaj hauv qab ntawm lub thawv tuaj yeem rov qab tau nws cov qub elasticity nyob rau lub sijhawm luv luv, ua kom nws tiaj tus, thiab yuav tsis tsim ib qho av sunken.
Post lub sij hawm: Apr-04-2023