Question: Measure the height difference between points A and B with a level instrument. It is known that the elevation of point A H A is

Measure the height difference between points A and B with a level instrument. It is known that the elevation of point AHA is 11.254m, the center cross reading of A ruler is )=(1724mm, and the center cross reading of B ruler is 1382mm(b). What is the height difference hAB between the A and B points? What is the elevation of point BHB?,(10%)
Measure the height difference between points A

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