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Expansion Joint Patent
Belly Pipe Patent- multi-layer heat insulation
Autoalarm Expansion Joint Patent
Belly Pipe Patent-heat insulation
Belly Pipe Patent-tuyere
Oxygen Lance Patent
Metal Hose Patent
Expansion Joint Patent-cooling wall
Oxygen Lance Patent

leyu乐鱼体育官网ISO Quality System Certificate -Chinese

ISO Quality System Certificate -English

Imp. & Exp. Registration
Special Equipment Manufacturing License -pressure pipeline
Type Test Certificate-Metal Hose

Type Test Certificate-Expansion Joint

Trademark Registered Certificate
Business License
Member of High & New-tech Industry
Supplier’s Access Certificate of China Petroleum

leyu乐鱼体育官网Member of Petroleum, Petrochemical Group

Member of Quality and Brand Association
Member of Welding Association
Credit Grade of CCB
Supplier’s Access Certificate of China Petroleum
A large bellows.Jpg automatic molding machine
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