DE623518C - - Google Patents

Info

Publication number

DE623518C

DE623518C DENDAT623518D DE623518DA DE623518C DE 623518 C DE623518 C DE 623518C DE NDAT623518 D DENDAT623518 D DE NDAT623518D DE 623518D A DE623518D A DE 623518DA DE 623518 C DE623518 C DE 623518C

Authority

DE

Germany

Prior art keywords

corrugated

corrugated tube

piece

opening

diameter

Prior art date

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

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• 230000001681 protective effect Effects 0.000 claims description 10
• 230000029058 respiratory gaseous exchange Effects 0.000 claims description 6
• QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
• 229910052760 oxygen Inorganic materials 0.000 claims description 5
• 239000001301 oxygen Substances 0.000 claims description 5
• KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
• 230000037431 insertion Effects 0.000 description 2
• 238000003780 insertion Methods 0.000 description 2
• 229940072033 potash Drugs 0.000 description 2
• 235000015320 potassium carbonate Nutrition 0.000 description 2
• BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
• 241000212113 Equus hydruntinus Species 0.000 description 1
• 239000003245 coal Substances 0.000 description 1
• 230000035515 penetration Effects 0.000 description 1