NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
DIN IEC 60963 ; VDE 0372-2:1996-10 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| ISO 4793 | 1980-10 | Laboratory sintered (fritted) filters; Porosity grading, classification and designation More |