环形波纹 meaning in Chinese
ring waves
Examples
- Standard specification for 12 to 60 in . 300 to 1500 mm annular corrugated profile - wall polyethylene pipe and fittings for gravity - flow storm sewer and subsurface drainage applications
自流式雨水管和地下排水装置用12至60英寸300 to 1500 mm环形波纹状异型壁聚乙烯管和配件的标准规范