projects_machine_1:
  id: 1
  project_id: 1
  machine_id: 6

projects_machine_2:
  id: 2
  project_id: 1
  machine_id: 2

projects_machine_1:
  id: 1
  project_id: 1
  machine_id: 6

projects_machine_2:
  id: 2
  project_id: 1
  machine_id: 2