NNN-C-680 Base Document:1961
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
CRUCIBLE FILTERING AND IGNITION AND COVER LABORATORY
22-03-1993
English
Specifies various sizes of porcelain ignition and filtering crucibles and covers.
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