ASTM A1128-24
在需要外部约束的情况下连接无毂铸铁污水管和配件的具有整体约束特征的不锈钢屏蔽橡胶垫圈联轴器的标准规范
Standard Specification for Stainless Steel Shielded, Rubber Gasketed Couplings Having an Integral Restraint Feature for Joining Hubless Cast Iron Soil Pipes and Fittings Where External Restraint Is Re