Roof Drains with Integral Overflow Drain or Air Vent
带有整体溢流排水管或通风口的屋顶排水管
本标准涵盖带整体溢流或通风口的屋顶排水管,并规定了相关要求
用于材料、物理特性、性能测试和标记。
This Standard covers roof drains with integral overflows or air vents and specifies requirements
for materials, physical characteristics, performance tests, and markings.