| 000 | 00259nam a2200073 4500 | ||
|---|---|---|---|
| 080 |
_a _b |
||
| 245 | _aISO: 4793 - 1980; Laboratory sintered (fritted) filters - porosity grading, classification and designation | ||
| 700 | _aInternational Organisation for standards | ||
| 260 |
_aGeneva _bISO _c1980 |
||
| 300 | _a7p | ||
| 999 |
_c34527 _d34527 |
||