Home > Term: bell-bottom pier hole
bell-bottom pier hole
A type of shaft or footing excavation, the bottom of which is made larger than the cross section above to form a bell shape.
- Μέρος του λόγου: noun
- Κλάδος/Τομέας: Fire safety
- Category: Prevention & protection
- Company: NFPA
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Δημιουργός
- nomura
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