GOST 7909
GOST 7909 (Drill prospecting pipes and sockets for them. Specifications)· GOST (Russia) · 2 materials
| Designation | Alternative designation | Material group | |
|---|---|---|---|
| 36G2S | 36Г2С | Structural and constructional steels | chevron_right |
| D | Д | Structural and constructional steels | chevron_right |