[
  {
    "machine_id": "m_comp1",
    "canonical_name": "1호 컴프레서",
    "aliases": [
      "컴프레서 1",
      "1번 압축기"
    ],
    "line_id": "L1",
    "machine_type": "compressor",
    "installed_year": 2019
  },
  {
    "machine_id": "m_motor2",
    "canonical_name": "2호 모터",
    "aliases": [
      "2호모터",
      "모터 2"
    ],
    "line_id": "L2",
    "machine_type": "motor",
    "installed_year": 2020
  },
  {
    "machine_id": "m_motor3",
    "canonical_name": "3호 모터",
    "aliases": [
      "모터 3"
    ],
    "line_id": "L3",
    "machine_type": "motor",
    "installed_year": 2018
  },
  {
    "machine_id": "m_conv2",
    "canonical_name": "2라인 컨베이어",
    "aliases": [
      "컨베이어",
      "컨베이어 벨트"
    ],
    "line_id": "L2",
    "machine_type": "conveyor",
    "installed_year": 2021
  },
  {
    "machine_id": "m_fan1",
    "canonical_name": "1라인 냉각팬",
    "aliases": [
      "냉각팬"
    ],
    "line_id": "L1",
    "machine_type": "fan",
    "installed_year": null
  },
  {
    "machine_id": "m_comp2",
    "canonical_name": "2호 컴프레서",
    "aliases": [
      "컴프레서 2"
    ],
    "line_id": "L2",
    "machine_type": "compressor",
    "installed_year": 2022
  },
  {
    "machine_id": "m_pump1",
    "canonical_name": "1호 펌프",
    "aliases": [
      "펌프 1"
    ],
    "line_id": "L3",
    "machine_type": "pump",
    "installed_year": 2017
  },
  {
    "machine_id": "m_fan2",
    "canonical_name": "2라인 송풍팬",
    "aliases": [
      "송풍팬"
    ],
    "line_id": "L2",
    "machine_type": "fan",
    "installed_year": 2020
  },
  {
    "machine_id": "m_motor1",
    "canonical_name": "1호 모터",
    "aliases": [
      "모터 1"
    ],
    "line_id": "L1",
    "machine_type": "motor",
    "installed_year": 2019
  },
  {
    "machine_id": "m_conv3",
    "canonical_name": "3라인 컨베이어",
    "aliases": [
      "3라인 벨트"
    ],
    "line_id": "L3",
    "machine_type": "conveyor",
    "installed_year": 2021
  }
]