National foreword<br>National Annex NA (informative) - Bibliography<br>European foreword<br>Foreword<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Dimensions<br>5 Materials<br>6 Construction<br>7 Safety requirements and testing<br>8 Use of vacuum vessels<br>9 User information<br>10 Marking<br>Annex A (normative) - Testing glass for residual<br> strain (bifilar method)<br>Bibliography