Qhov rooj thiab qhov rais yog ib qho tseem ceeb ntawm chav nyob

Qhov rooj thiab qhov rais yog ib qho tseem ceeb ntawm chav nyob. Qhov rooj thiab qhov rais tau dhau los ntawm plaub lub sijhawm: ntoo, hlau, aluminium alloy, thiab yas steel qhov rooj thiab qhov rais. Cov qhov rooj ntoo thiab qhov rais yog tus nqi nruab nrab, muaj cov tsos mob tsis zoo, tsis zoo sealing, ua rau muaj hluav taws kub thiab tawg, deform thiab tawg, thiab tsuas yog tsim nyog rau kev siv qib qis. Lawv tsim nyog rau cov chaw dav dav, muaj cov nqi kho mob siab, thiab muaj lub neej ua haujlwm luv luv. Steel welded qhov rooj thiab qhov rais muaj tus nqi qis, qib qis, muaj kev cuam tshuam rau corrosion thiab deformation, tus nqi saib xyuas siab, kev pab lub neej luv luv, thiab tab tom ntsib kev tshem tawm. Aluminium alloy qhov rooj thiab qhov rais muaj cov nplaim hluav taws zoo, zoo nkauj zoo nkauj, tab sis tsis zoo tag nrho cov kev ntseeg siab, nws muaj qhov deformation thiab corrosion, thiab muaj cov rwb thaiv tsev tsis zoo, rwb thaiv tsev, thiab suab rwb thaiv tsev.