GB/T 20928
GB/T 20928 (Seamless inner grooved copper tube)· GB (China) · 6 materials
| Designation | Material group | |
|---|---|---|
| C12200 | Copper | chevron_right |
| T10150 | Copper | chevron_right |
| T10180 | Copper | chevron_right |
| TP2 | Copper | chevron_right |
| TU1 | Copper | chevron_right |
| TU2 | Copper | chevron_right |