The lexicon of the top500 ( The Encyclopedia for Classification Codes ) explains the codes and definitions in the world of economical classifications.
NACE Code 20.1 Sawmilling and planing of wood; impregnation of wood
The NACE Code 20.1 is described as
Sawmilling and planing of wood; impregnation of wood
It belongs to the code group
NACE Code 20 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials
To this Code "20.1" belongs the sub codes
NACE Code 20.10: Sawmilling and planing of wood; impregnation of wood