国产va免费精品观看精品,www亚洲com,日韩黄色片视频,久久婷婷人澡人人爽人人,成人免费试看,九九免费观看视频,国产又粗又猛又爽又黄的视频p站

About us
Qualification Certificates
Certificate for Quality Management System
Accreditation of Shaanxi Non-ferrous Metal
Holding Group Ltd.
Certificate for Environment Management System
Accreditation of Shaanxi Non-ferrous Metal
Holding Group Ltd.
Certificate for Occupation Health & Safety 
Management System Accreditation of Shaanxi
Safety Production License for Shaanxi Non-ferrous
Metal Holding Group Ltd.
Design Qualification for Xi?ˉan Exploration & Design Research Institute under Shaanxi Non-ferrous Metal Holding Group Ltd.
Three-A Honor Certificate for Enterprise Certificate for Quality 
Management System 
Accreditation
Shaanxi Provincial Credit Enterprise in 2004 China Top 100 Enterprises on
Integrated Design Capacity
Metallurgy Design Qualification for Xi?ˉan Non-ferrous Metallurgy Design &Research Institute under Shaanxi Non-ferrous Metal Holding Group Ltd.
Certificate for Grade A Engineering Design Certificate for Engineering Consulting Qualification
Certificate for Grade A Qualification on Engineering Cost Consulting Certificate for City Planning Qualification