| C09K8/02 | .Well-drilling compositions |
|
Note(s) In groups C09K 8/03-C09K 8/38, the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, classification is made in the last appropriate place. [8] |
Descriptions for C09K8/02 and notes/indexes are displayed on this screen.