Yog tias cov ris tsho zoo nkauj rau cov nyiaj ib txwm ua ib khub ob lub hlis thiab tom qab ntawd lawv tau sib luag, tab sis qhov no tsis yog peb txoj kev, thiab ntxiv dag zog rau cov ntaub.
Nws muaj peev xwm ntxiv rau cov polymer hauv cov kua ua kua, qhov kev xaiv yooj yim tshaj plaws ntawm polyvinyl acetate, uas yog, kom impregnate lub pva lo.
Tom qab ziab, tsis muaj kab, lub ris pib ua neej nyob rau lub xyoo kom txog thaum lawv sawv hauv lwm qhov chaw.
Yog li wb mus! Peb xav tau:
Neeg laus
PVA nplaum (yam)
Tassel, tab sis koj tuaj yeem thiab ntiv tes.
Yog hais tias lub ris twb muaj "mais nyob rau hauv Lavxias Federation" yog li txawm tias zoo dua, tam sim no tuaj yeem pom qhov twg end tshwm sim.
Muaj txiaj ntsig tuav PVA (muaj kev sib tw mus khaws cia) thiab dej qhov "cuam tshuam rau".
Tom ntej no, tshiav txhuam yog tias nws tsis yog los ntawm saum cov txheej ntawm cov kua nplaum kua (impregnate). Txhuam, tom qab siv, yaug nrog dej sov thiab ncua mus rau hauv lub thawv ntev, ua ke nrog PVA.
Nag hmo qhuav. UTrickoy Koj tuaj yeem hnav cov pas nrig thiab zoo siab rau ntawm lub nroog yeiuxalees. Yog tias koj feem ntau ua pov thawj qhov chaw no rau cov neeg rau kev kuaj xyuas - lub ris tau hloov pauv, tom qab ntawd flaws nrog cov kua nplaum tshaj yuav ploj mus. Sij hawm dhau los, cov kua nplaum tau ntxuav tawm, thiab dhau peb lub hlis ntawm cov txheej txheem yog tsim nyog rov ua dua, vim tias Fakament pib dua.
Ib qho chaw