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    "ISO 5167-4 classical Venturi tube: Q = C E A2 √(2Δp/ρ); C from convergent type; β and Re_D bound the ISO envelope; incompressible ε=1; C is reported, not an input",
    "Machined C=0.995, D∈[50 mm,250 mm], β∈[0.40,0.75], Re_D∈[2e5,1e6]. Rough-welded C=0.985. As-cast C=0.984",
    "Not a given C_d=0.98, not ISA 1932 nozzle, not RHG orifice, not Q=Av, not Darcy f, not compressible ε"
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    "ISO 5167-4 classical Venturi tube: Q = C E A2 √(2Δp/ρ); C from convergent type; β and Re_D bound the ISO envelope; incompressible ε=1; C is reported, not an input",
    "Machined C=0.995, D∈[50 mm,250 mm], β∈[0.40,0.75], Re_D∈[2e5,1e6]. Rough-welded C=0.985. As-cast C=0.984",
    "Not a given C_d=0.98, not ISA 1932 nozzle, not RHG orifice, not Q=Av, not Darcy f, not compressible ε"
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    "C_d given, orifice d+D, tank H, A or v, Darcy f, μ, Cv/Kv, K, ε, tapping, kind=isa1932 → MIXED_INPUT_ENCODING",
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      "url": "https://www.iso.org/standard/31895.html",
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      "title": "ISO 5167-4 — Measurement of fluid flow by means of pressure differential devices — Venturi tubes",
      "section": "Classical Venturi tube discharge coefficient",
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      "supports": "C from convergent type. Not a given C_d, not an ISA 1932 nozzle, not an orifice plate",
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