| C09K21/00 | Fireproofing materials |
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Note(s) In groups C09K 21/02-C09K 21/14, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, materials are classified in the last appropriate place. [4] |
Descriptions for C09K21/00 and notes/indexes are displayed on this screen.