Renova les teves joguines: Xarxa de punts de recollida i d’intercanvi de joguines
by: Ajuntament de Barcelona - Àrea de Medi Ambient
Spain
- BARCELONA
19/11/2018
Description:
Presenting a system to excavate Tunnels by coring, therefore recovering the rocks, decreasing the mud and drilling waste produced, and the energy requirements
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