The theodolites used for making tacheometric observations by optical wedge system, are

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Question:
The theodolites used for making tacheometric observations by optical wedge system, are

1.provided with stadia hairs in front of eye piece

2.not provided with stadia hairs at all

3.fitted with a glass wedge inside the telescope

4.fitted with a glass wedge in front of telescope.

Posted Date:-2021-05-13 08:27:18

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