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Statistical classifications
CPA-2008 (ca)
Groups
422 — Xarxes i treballs de construcció de xarxes
Descendants
Code
Description
4221
Xarxes per a fluids i treballs de construcció de xarxes per a fluids
4222
Xarxes elèctriques i de telecomunicacions i treballs de construcció de xarxes elèctriques i de telecomunicacions