Here is a gallery of some of the diagrams I worked on for Wikimedia. H Padleckas
Chemical Engineering
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3-way valve positions
Metering pump head
Conically-tapered ground glass joints
Ground glass ball and socket joints
Glass O-ring joints with elastomer O-ring in between
Simple chem distillation
Distillation by Alembic
Round-bottom flasks
Urban planning and Real estate
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Image:Lot map.PNG|Real estate lot map
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