{
  "schema_version": 1,
  "id": "pcr.metal-products-machinery-and-equipment.special-purpose-machinery.agricultural-self-loading-and-unloading-trailer",
  "title": {
    "en-US": "Agricultural self-loading and unloading trailer manufacture",
    "zh-CN": "农业自装卸挂车制造"
  },
  "status": "candidate",
  "pcr_kind": "product_category_rule",
  "content_maturity": "authored_methodology",
  "version": "0.1.0",
  "domains": [
    "metal-products-machinery-and-equipment"
  ],
  "modules": {
    "core": [
      "pcr-minimum-content",
      "unit-of-analysis",
      "reference-flow",
      "inventory-flow-taxonomy",
      "system-boundary",
      "allocation",
      "data-quality",
      "validation-rules"
    ]
  },
  "target_entities": [
    "flow",
    "process",
    "lifecyclemodel",
    "dataset"
  ],
  "languages": {
    "canonical": "en-US",
    "available": [
      "en-US",
      "zh-CN"
    ]
  },
  "translation_status": {
    "zh-CN": "aligned"
  },
  "classification_refs": [
    {
      "system": "CPC",
      "version": "3.0",
      "code": "44160",
      "title": "Self-loading or self-unloading trailers and semi-trailers for agricultural purposes",
      "mapping_type": "exact"
    }
  ],
  "review_metadata": {
    "scientific_review": "pending",
    "semantic_boundary_decision": "New manufacture record for non-self-propelled agricultural self-loading/self-unloading trailers and semi-trailers; includes declared integral pickup/chopping/unloading and running gear; excludes ordinary freight trailers, tractors, self-propelled carriers, slurry applicators and field manure/fertilizer spreaders covered by the existing material application-machinery PCR. Legacy leaf and all shared mappings remain untouched.",
    "unresolved_flow_identities": [
      {
        "row_id": "steel_sheet",
        "selected_flow": "Hot-rolled non-alloy steel sheet",
        "reason": "Name/description conflict in non-alloy steel candidate; generic sheet has contradictory Chinese display. Exact stock grade and state unverified."
      },
      {
        "row_id": "solid_wire",
        "selected_flow": "Copper-coated solid carbon-steel welding wire",
        "reason": "Flux-cored carbon steel or generic wire candidates do not identify copper-coated solid carbon-steel welding wire."
      },
      {
        "row_id": "argon",
        "selected_flow": "Argon gas for welding",
        "reason": "Search returned unspecified gases or CO2 protection gas rather than verified pure argon; composition remains unresolved."
      },
      {
        "row_id": "caustic",
        "selected_flow": "Sodium hydroxide cleaning reagent, supplied concentration declared",
        "reason": "Pure or specified concentrated sodium hydroxide does not establish supplied aqueous cleaning reagent concentration."
      },
      {
        "row_id": "alkaline_effluent",
        "selected_flow": "Spent aqueous alkaline cleaning solution",
        "reason": "Searched aqueous waste candidates do not establish this segregated alkaline solution composition and treatment gate."
      },
      {
        "row_id": "gearbox",
        "selected_flow": "Agricultural trailer unloading gearbox",
        "reason": "Wind-turbine/other machinery gearboxes do not identify agricultural trailer unloading gearbox."
      },
      {
        "row_id": "hydraulic_cylinder",
        "selected_flow": "Complete hydraulic cylinder",
        "reason": "Returned machined cylinder parts are incomplete; not a finished cylinder with seals and fittings."
      },
      {
        "row_id": "pto_shaft",
        "selected_flow": "Guarded agricultural power-take-off shaft",
        "reason": "Search candidates do not establish a complete guarded agricultural PTO shaft with declared joints and guards."
      },
      {
        "row_id": "roller_chain",
        "selected_flow": "Steel flat-link floor conveyor chain",
        "reason": "Searches for roller and flat-link chains did not establish the specified agricultural moving-floor finished chain."
      },
      {
        "row_id": "ball_bearing",
        "selected_flow": "Steel radial ball bearing",
        "reason": "Broad mixed ball/roller categories, cages or wind turbine bearings do not establish a steel radial ball bearing."
      },
      {
        "row_id": "fastener",
        "selected_flow": "Carbon-steel bolt",
        "reason": "Generic steel fasteners do not establish one carbon-steel bolt grade and delivery coating."
      },
      {
        "row_id": "control_unit",
        "selected_flow": "Agricultural trailer unloading electronic control unit",
        "reason": "Automotive airbag, machine-tool and unrelated chemical candidates do not identify agricultural trailer control hardware."
      },
      {
        "row_id": "pack_board",
        "selected_flow": "Corrugated paperboard protective pad",
        "reason": "Specific box or fibre-mixture candidates do not establish an unspecified protective corrugated pad."
      },
      {
        "row_id": "high_strength_sheet",
        "selected_flow": "High-strength steel sheet",
        "reason": "Verified hot-rolled low-alloy high-strength thick plate candidate 421db3a5-394d-410b-8ebf-af23a37fc878 does not cover generic loader-floor sheet or unspecified delivery state."
      },
      {
        "row_id": "carbon_dioxide_shield",
        "selected_flow": "Pure carbon dioxide welding shielding gas",
        "reason": "Direct CO2 welding proxy has Volume*time reference property, incompatible with gas mass; no substitution."
      },
      {
        "row_id": "hydraulic_motor",
        "selected_flow": "Agricultural trailer hydraulic unloading motor",
        "reason": "Search candidates do not establish the configured purchased agricultural hydraulic unloading motor."
      }
    ],
    "unresolved_evidence": [
      "Chemical recipes, net mass, utilities, test media, installed-component BOM and service life must not be inferred from manufacturer examples. Site data required before dataset completeness.",
      "Scientific review and independent translation review remain pending."
    ],
    "identity_rejections": [
      "ce3ac926-5d6f-4558-9edc-67179d93dde4: non-alloy name but alloy steel description, not matched to hot-rolled non-alloy sheet.",
      "cf3aee56-4f27-4e77-b96b-126016a1674f: CO2 shielding proxy has Volume*time reference property, not consumed gas mass.",
      "Manufacturer floor or belt description does not establish generic grade or polymer chemistry.",
      "Generic wind-turbine or automotive component candidates cannot identify trailer-specific components."
    ],
    "inventory_contract": {
      "atomic_flows": "v1",
      "localized_flow_names": "tiangong_zh_v1"
    }
  }
}