<?xml version="1.0" encoding="UTF-8" standalone="no"?><image-reference id="_79d4acca-3c3e-456d-89a6-8d582cf71e4c"><num>11.2.2d</num><title id="_94272a25-0977-4464-a4f4-b90250c9a9b4">Spiral stairs — Measurement for slope relationship</title><image alt="Spiral stairs — Measurement for slope relationship." href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/11-2-2d-spiral-stairs-measurement-for-slope-relationship.svg"/></image-reference>