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:[[Pledges/PCB_Etch_Tank]] The purchase of a secondhand etch tank | :[[Pledges/PCB_Etch_Tank]] The purchase of a secondhand etch tank | ||
:[[Project:PCB_Etch_Tank]] A proposal to build a spray etch tank | :[[Project:PCB_Etch_Tank]] A proposal to build a spray etch tank | ||
:[http://en.wikipedia.org/wiki/Polychlorinated_biphenyl Polychlorinated Biphenyl] a transformer cooling fluid now deprecated due to environmental concerns |