|Copper Electron Tube
| Stackable || Yes (64)
| Source Mod || Forestry
The Copper Electron Tube
is added by Forestry
Electron tubes are used in most of the recipes for farms, as well as being used to upgrade certain machines. And can only be crafted in a Thermionic Fabricator, requiring Molten Glass.
It is used for the Peat Bog farm machine.
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