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[ { "name": "vacuum-electronic", "displayName": "真空电子器件", "parent": null }, { "name": "ion-device", "displayName": "离子器件（充气管）", "parent": { "name": "vacuum-electronic", "displayName": "真空电子器件", "parent": null } }, { "name": "gdt", "displayName": "气体放电管", "parent": { "name": "ion-device", "displayName": "离子器件（充气管）", "parent": { "name": "vacuum-electronic", "displayName": "真空电子器件", "parent": null } } } ]

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