clearance between poles,pole distance
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- precision processing
- rock terrace
- organoclay
- speciation
- Suspended solids
- descloizite
- discharge hydrograph
- old plate tectonics
- volcanic ejecta
- sial
- artificial radioactive element
- greenwich meridian
- acid geochemical barrier
- temperature barrier
- ala twin
- layering of relief
- ferganite
- cuesta
- limonite
- soil subtype