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75kg (165 lb) Capacity Folding Stair Climbing Hand Truck H109
Brand: Generic / OEM
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Audited BOM: 8 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
The promise of easy stair climbing is compromised by insufficient grip of the triangular wheels on various types of steps, leading to engineering failures (ENG-004) that result in RMAs (RMA-004) and negative reviews (REV-001, REV-005).
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