National standard double wall corrugated pipe author Tiangang time 2020-03-3016:19 National standard double wall corrugated pipe execution standard
Product Details
National standard double wall corrugated pipe
author
tiangang
time
2020-03-30 16:19
The national standard for double wall corrugated pipes, GB/T19472.1-2004 ring stiffness, ring flexibility, diameter, appearance dimensions, impact, and random sampling package are qualified!