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A
a1
x
0.5 m
6) Rotate the laser 180°. Reposition the laser and
verify that the 2 vertical lines pass through a1 and c1.
7) Mark on wall B the the intersection point of the beams as b1
(see figure # 2).
180°
A
a1
x
0.5 m
14
approximately 5 m
C
c1
x
2 m
Figure # 1
C
c1
x
2 m
Figure # 2
B
B
b1
x
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