Bosch GLL 50 Operating/Safety Instructions Manual page 25

A
B
– Set up the measuring tool 16 ft (5 m) away turned by 180° and allow
it to level in.
– Align the height of the measuring tool (using a tripod or by under-
laying, if required) in such a manner that the center of the laser line
is projected exactly against the previously marked point II on wall B.
– Mark the center of the laser line as point III (vertically above or be-
low point I) on the wall A.
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