Parts of physical, chemical, optical, and electro-technical apparatus, as far as included in this class, namely, electric coils and optical lenses; surveying machines and instruments; parts of nautical, weighing, signaling, measuring, and monitoring apparatus, resistors and potentiometers, namely, electric coils and electric sensors; parts of physical, chemical, optical and electro-technical apparatus, namely, electric coils, optical lenses and electric sensors; connecting parts for electrica...