FIELD: agriculture.
SUBSTANCE: invention relates to animal breeding. The device comprises a housing, rotary indicators and a measuring scale. The housing is made in the form of an inverted T-shaped profile which base is narrowed toward the front part. The rotary indicators are mounted on both sides of the wall, spring loaded to the base and provided with a device for their fixing.
EFFECT: invention enables to improve the accuracy of measurement.
6 cl, 13 dwg
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