目录简介 | Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 5 Test methods 6 Inspection rules 7 Label and instructions 8 Packaging, transport and storage Annex A (Normative) Hydraulic friction test methods Annex B (Normative) Main sealing of clack valve Annex C (Informative) Installation and use instruction of wet alarm valve, retard chamber and water motor alarm
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