[Solved] Part Request: Plastic Science & Technology Panels

[Eugen]

In 45400-1 set has few protractors in a form of translucent blue plastic plates with white one side pattern labels:

• bb0278bpb01 - small circle protractor plate
  
• bb0278dpb01 - large triangle protractor plate
  
• bb0278fpb01 - small triangle protractor plate
  

Suggested "!KEYWORDS": Helpers, Rulers, Measuring Instruments, Measurement, Instrumentation

There is also solid brick bb0342 - "Triangle Ruler" LEGO part (not in this set) and parts of the ruler in the 5005107-1 - "Buildable Ruler" set, and thats might be all the measuring instruments made by LEGO.

Note: As they are LEGO-made they not fits to "!CATEGORY Helpers"

• https://www.ldraw.org/draft-documents/helper-parts.html