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| piping and conduit | |||
| pipeline | |||
| pipeline A line of pipe connected to valves and other control devices, for conducting fluids, gases, or finely divided solids | |||
| piping | |||
| oil pipeline | |||
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| petroleum pipe line | |||
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| piping | |||
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pijpleiding : 17 do fraz, 10 tematyki |
| Budownictwo | 1 |
| Ekonomia | 1 |
| Finanse | 1 |
| Inżynieria mechaniczna | 1 |
| Ochrona środowiska | 2 |
| Pospolicie | 1 |
| Produkty mineralne | 1 |
| Rolnictwo | 1 |
| Transport | 5 |
| Węgiel | 3 |