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Selecting and preparing polishing pads

Interference rings projected by test plate glasses

Precisely arranging diamond pellets

Grinding skill that determines the identity of an optical element

Bringing back the slotted-head screw

Diaphragm blade design and assembly

Tools we make and use ourselves

Plating to perfection by hand and eyesight

Individually matching rectilinear keys and guides

Helicoid lapping
