Roll-shear kauv duct tshuab yog cais raws li cov khoom siv
Dec 23, 2021
1. Raws li cov khoom siv, lub tshuab dov shear kauv duct tuaj yeem muab faib ua: hlau duct thiab tsis yog hlau duct.
Ntawm lawv: (1) Cov ducts hlau tuaj yeem muab faib ua cov ducts steel, aluminium ducts, stainless hlau ducts, thiab lwm yam.
(2) Non-metallic yob-shear kauv duct tshuab tuaj yeem muab faib ua: tawv polyvinyl chloride duct, organic iav duct, inorganic iav duct, iav fiber reinforced yas ducts thiab lwm yam ducts, thiab lwm yam.
2. Raws li cov duab ntawm lub tshuab yob-shear kauv duct, nws tuaj yeem muab faib ua: round duct thiab rectangular duct.
3. Raws li kev ua haujlwm siab ntawm lub tshuab cua thiab cua txias, nws tuaj yeem muab faib ua peb pawg: lub tshuab cua siab siab, nruab nrab-siab cua duct, thiab cua txias cua duct.
