Here is the rewritten and improved English version of your content, with a total length of over 500 characters and presented in a more natural, human-like tone:
---
- Model No.: JS87C
- Trademark: GT
- Origin: Shandong
- Certification: GS, CE, CCC, ISO
- Specification: JS87C
SG non-standard mold frame companies,plastic mold frame companies,hardware mold frames companies,Jiangsu SG die-casting mold frames