A le gbe awọn oriṣiriṣi awọn iru ti ṣiṣu manhole igbese, a ni kikun awọn sakani ti awọn igbesẹ, gẹgẹ bi awọn Iron, Erogba irin, alagbara, irin, aluminiomu ati ṣiṣu encapsulated.
A tun ni anfani lati ṣe agbekalẹ awọn aṣa tuntun pẹlu iyaworan alabara tabi apẹẹrẹ.
Alaye diẹ sii wa nigbati o ba gba ibeere rẹ.
1) DIN19555 / EN13101
2) BS1247