Top IPC subclasses
1
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A01C
|
4
|
Planting; sowing; fertilising
|
2
|
B24B
|
3
|
machines, devices, or processes for grinding or polishingdressing or conditioning of abrading surfac
|
3
|
G01N
|
1
|
Investigating or analysing materials by determining their chemical or physical properties
|
4
|
G01M
|
1
|
testing static or dynamic balance of machines or structurestesting structures or apparatus not other
|