... four parts, vacuuming host (power device), vacuum network, vacuuming socket and vacuuming tools components. Its basic principle: host installed in ... room, every room installs a vacuuming socket, use only; Will vacuuming hose inserted vacuuming socket, host can start work. Aspiration of ... inside the pipes to host embed in garbage bags, host machine adopts five-layer filtration system, it can filter out ...