| IPC 7 English version |
| Class E03 |
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| SECTION E – FIXED CONSTRUCTIONS |
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| E 03 | WATER SUPPLY; SEWERAGE |
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| E 03 B | INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER (drilling wells, obtaining fluids in general from wells E21B; pipe-line systems in general F17D) |
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| E 03 C | DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B, E03F); SINKS |
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| E 03 D | WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR |
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| E 03 F | SEWERS; CESSPOOLS |
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