Ambala, Haryana, India
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Glass, optically worked, back silvered both concave &convex
|
(I)CV |
(II) CX |
|
(I)CV |
(II) CX |
|
38 |
75 |
h) |
50 |
150 |
|
38 |
100 |
i) |
50 |
200 |
|
38 |
150 |
j) |
50 |
300 |
|
38 |
200 |
k) |
75 |
75 |
|
38 |
300 |
1) |
75 |
150 |
|
50 |
75 |
m) |
100 |
300 |
|
50 |
100 |
|
|
|
Plane, circular, smooth edge, 50 mm dia, back silvered, with protective coating.
To reflect a glancing beam of light to produce interference with an undeviated beam of light from the same source. It comprises a plane glass 75 x 38 mm with black rear surface, mounted in a metal frame.
