Seamless covalent welding
Many macroscopic structures like water pipes, streets, ... can't be created as a whole by a single nanofactory. Still they should be assembled makro-robotically in a high up convergent assembly layer when there's highly repetitive work. The possibility for direct physical manipulation by human hands (assembly/disassembly) instead of a necessary detour over a virtual model is desirable for initial designs or artistic work or other reasons.
High level surface interfaces allowing such action (= capable of quasi welding) must account for the much lower human positioning accuracy and the dirty environment. They must recognize the partner surface capture it at some spot (probing on command) align it correctly and expel all of the dirt the surfaces have accumulated.
related with: recycling
- mergement of machine phases
