China 'GB/T 41666.3-2022
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 41666.3-2022
Plastic piping systems for Trenchless repair of underground pressureless drainage networks - Part 3: close fitting lining method 地下无压排水管网非开挖修复用塑料管道系统 第 3 部分:紧密贴合内衬法
Issued Date:2022/4/15
Implemented Date:2022/11/1
Issued by:
The Standardization Administration of the People's Republic of China