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2)
Screw down the metal bracket with the same position as the instruction figure, and drill the hole with at least 20mm diameter in specific
area.
Notes:
this step is very important, and includes 2 key factors, 1. The centre line of the biggest circle
the other circles. 2. The biggest circle should be between 20mm to 25mm in diameter.
should be on the same horizontal line as
14
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