Qee tus neeg hais tias lawv cov laj kab ntoo aluminium tau tawg ua ntej nws tau siv rau ib xyoos, tab sis lawv kuj tau xyuam xim rau kev tiv thaiv. Yuav ua li cas zoo li no tshwm sim? Peb tau kawm tias qhov ncaj qha ua rau tawg ntawm cov ntoo aluminium guardrails yog cov dej noo ntawm cov ntoo. Feem ntau, ntoo thiab nws cov khoom muaj qee qhov dej noo, thiab feem pua ntawm cov dej noo hauv cov ntoo mus rau qhov hnyav ntawm cov ntoo tom qab ziab yog cov dej noo ntawm cov ntoo. Txhawm rau ua kom cov khoom ntoo hloov tau zoo rau kev nyab xeeb thiab nyob ib puag ncig, kev ziab thiab kho cov ntoo yog ua raws li cov qauv hauv zos noo noo thaum lub sij hawm tsim cov khoom ntoo. Qhov no ua kom ntseeg tau tias cov ntsiab lus noo noo ntawm cov ntoo yog raws li qhov nruab nrab noo noo cov ntsiab lus ntawm cov cua hauv cheeb tsam ntawm kev siv, los xyuas kom meej qhov ruaj khov ntawm cov khoom siv ntoo.
Vim qhov chaw sib txawv ntawm thaj chaw, qhov nruab nrab noo noo nyob rau hauv cov huab cua sib txawv. Yog li ntawd, cov cheeb tsam sib txawv muaj cov kev xav tau sib txawv rau cov dej noo ntawm cov khoom ntoo. Piv txwv li, qhov nruab nrab noo noo cov ntsiab lus ntawm huab cua nyob rau hauv Beijing yog 11.4%, thaum nyob rau yav qab teb cheeb tsam nws yog nyob ib ncig ntawm 14%. Tshwj xeeb, cov khoom yuav tsum tau nyob nruab nrab ntawm qhov sib ntxiv lossis rho tawm 1 ntawm qhov nruab nrab ntawm cov dej noo hauv zos, "said Li Jiguang, tus thawj coj ntawm Wood Furniture Quality Supervision and Inspection Station. Cov dej noo ncaj qha cuam tshuam rau qhov zoo thiab siv cov rooj tog ntoo, tshwj xeeb tshaj yog cov khoom zoo. Cov rooj tog ntoo yog tias cov dej noo tsawg, cov ntoo yuav nqus dej noo los ntawm huab cua, ua rau cov khoom ntoo nthuav dav thiab deform;