information about Ruler field
Field Hierarchy
Parent | |||
---|---|---|---|
Physics 33.7M papers | Quantum mechanics 13.6M papers | Astronomy 2.8M papers | |
Current | |||
Ruler 9,546 papers | |||
Child | |||
Cyclograph 0 papers | Set square 0 papers | Parallel rulers 0 papers | Measuring ruler 0 papers |
Graphometer 0 papers | Straightedge 1 papers |
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History