4. Geometrical instruments
  5. Indicator of direction of force traversing natural media
  6. Level or plumb, terrestrial gravitation responsive

Horng Chang

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Method and apparatus for inclination measurement using piezoelec

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent

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Method for inclination measurement using piezoelectric effect

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent

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