# Relationship Map

## Overview

Mô tả toàn bộ quan hệ giữa các thực thể trong hệ thống máy in.

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## Core Relationship Chain

Manufacturer
↓
Series
↓
Model
↓
Cartridge
↓
Drum
↓
Part
↓
Error
↓
Procedure
↓
Service

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## Reverse Relationship Chain

Service ← Procedure ← Error ← Part ← Model ← Series ← Manufacturer

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## Example Graph Flow

Canon
↓
LBP Series
↓
LBP2900
↓
Cartridge 303
↓
Drum Unit
↓
Paper Jam
↓
Cleaning Procedure
↓
Repair Service