Preparatory stage for the construction of a ventilated crawl space in an old building - Searching gas radon concept seen through a magnifying glass
Schlüsselwörter
paving,
floor,
flooring,
ventilation,
aerated,
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digging,
excavation,
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radon,
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air pollution,
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searching,
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home,
house,
construction industry,
construction,
architecture,
building,
industry,
magnifying glass,
checking,
attention,
alertness,
surveillance,
radioactivity,
protection,
security,
safe,
safety,
natural gas,
risk,
concrete
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