SPHEROMETER DOUBLE DISC |
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Brass dial head 40 mm dia with steel screw, divided and marked in 100 divisions, vertical scale 10-0-10
mm, fitted on heavy brass disc, distance between pointed legs 40 mm
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| PHY-233.1 |
Screw pitch 1 mm |
| PHY-233.2 |
Screw pitch 0.5 mm |
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