+86-135-6360-8338 liuyong@sgyzjx.com
- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
 |
1) Basic material: alloy structural steel 40Cr
2) Centralizing material: carbon fiber nylon
3) Standard: API Spec.11b
4) Hardness of basic material: HRA56-62
