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Insulating pipe
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wrench
Indoor pipe
Pipe
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Rear left
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Rear right
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the hole
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Outdoor
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Left
Wall
Φ55mm
Right
Mark in the middle of it
Level meter
Rear piping hole
Wall
Space
to the
wall
above
150mm
Space
to the
wall
above
150mm
Φ55mm
Rear piping hole