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Application filed by Ліна Віталіївна Дубровіна, Валентин Євгенович Козлов, Юрій Валентинович КозловfiledCriticalЛіна Віталіївна Дубровіна
Priority to UAU202303796UpriorityCriticalpatent/UA155284U/en
Publication of UA155284UpublicationCriticalpatent/UA155284U/en
Length-Measuring Instruments Using Mechanical Means
(AREA)
Drawing Aids And Blackboards
(AREA)
Abstract
The teacher's ruler consists of a ruler body with a scale with divisions from two to five, a stobal scale and the corresponding ESTC scale, a scale with divisions from zero to one. Contains a slider made of transparent material with a sight line. The corresponding reference points of all scales are combined. Contains an approximated logarithmic scale with divisions from two to five.