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Figure 19. Tribrach.
Figure 21. Objective, eyepiece and reticle, and optical plumbing.
Target Set, Surveying: Circular Level And Optical Plummet In Tribrach W/(Quick Release Mechanism
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1
Setscrew
5 Nut
2
Cover
6
Knob
3
Screw
7
Screw
4
Screw
8
Setscrew
Figure
20.
Leveling
screw.
44
AGO
10139A