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8) Without turning the laser, move the laser towards
wall B and place it approximately 0.5 meter from wall B.
9) Verify that the vertical beam passes through a1 and b1.
10) On wall B, mark the intersection point as b2 (see figure 3).
C
A
a1
x
11) Turn the laser 180° and reposition it. Verify that the
2 vertical beams pass through b2 and a1 points.
12) On wall A, mark the intersection point as a2 (see figure 4).
16
2 m
Figure 3
B
x
b1
b2
x
0.5 m
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