This part of FZ/T 20015 specifies the classification, naming and numbering of felts. This section applies to felt made by felting. Needle punched felt products can also be used as a reference.
FZ/T 20015.5-2012 Referenced Document
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
FZ/T 20015.5-2012 history
2012FZ/T 20015.5-2012 Classification, denomination and coding of wool textiles.Wool felt
1998FZ/T 20015.5-1998 Classification,denomination and coding of wool textiles.Wool felt