Precast concrete pipes, fittings and ancillary products-Specification for porous pipes
预制混凝土管道、配件和辅助产品 多孔管规范
发布日期:
1992-11-15
规定了无钢筋混凝土管道,允许水通过整个长度和部分或全部圆周进入,例如用于现场排水。
Specifies unreinforced concrete pipes which allow ingress of water through the whole length and over part or all of the circumference e.g. for field drainage purposes.