On Nov 4, 1:45*pm, Christopher Tidy
wrote:
Has anyone heard of a metalworking process called "rat lapping"? I am
researching an old firm and found a reference in Google Books which
lists them as " PRODUCT — Precision Rat Lapping & Grinding". Is this
actually a process, or is it just an OCR error when it should say
"Part Lapping"?

Best wishes,

Chris

Flat lapping is legitimate.
Think microns, such as optical flats.
Maybe Chinese?

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