Product Made in Japan
Manufacturer: Ultrasound
Model: JIS Z 2340 

Feature:

It is used for calibration and confirmation of visual observation conditions.
It is used to select the brightness, distance, and speed at which the required line pair can be identified.
When creating an image record, if the required line pairs can be identified on the image, they can be regarded as the equivalent of a visual image record.

Specification:

Pair of colored lines used in the survey.