Raws li kev ua haujlwm siab, lawv tuaj yeem muab faib ua atmospheric siab manholes thiab siab manholes, xws li atmospheric siab manholes nrog kev ua haujlwm siab ntawm 0.1 MPa thiab siab manholes uas tuaj yeem tiv taus 5 bar siab.
Raws li cov duab, lawv tuaj yeem muab faib ua elliptical manholes, round manholes, rectangular manholes, thiab square manholes, thiab lwm yam.
Raws li kev ua haujlwm thiab cov qauv, lawv tuaj yeem muab faib ua sai sai - qhib manholes, manholes nrog tsom iav qhov muag, thiab kev kub ntxhov ceev thiab nplaim taws ntes ua pa manholes. Tsis tas li ntawd, muaj lwm yam xws li rotary arch manholes.
