- Wenzhou Ruiyi Hardware Tools Co., Ltd.
- 全国主营:Hardware tools, Standard component, Locks, etc
- Xi'an Hengxing Precision Mechanical Spring Co., Ltd.
- 全国主营:Spring.
- Railroad Department Bridge Engineering Bureau Bridge Machinery Manufactory
- 全国主营:Engineering drilling machine, Steel beam, Crane.
- Wuhan Hanyang Shenlong Machinery Manufactory
- 全国主营:Casting
- Wuhan Steel Ball Factory
- 全国主营:Steel ball
- Wuhan Juntong Standard Parts Co., Ltd.
- 全国主营:Fasteners
- Wuhan No. 2 Standard Parts Factory
- 全国主营:Standard fasteners.
- Wuhan Machinery Industrial Research Institute
- 全国主营:Castings
- Wuhan Hydraulic Pneumatic Industrial Company
- 全国主营:Construction machinery hydraulic lamp, Drawbar hydraulic cylinder etc.
- Wuhan Gaolian Hardware Interlinking Co., Ltd.
- 全国主营:Auto anti-skid chains, Elevator chain etc.
- Wuhan Anda New Material Electronic Technique Company
- 全国主营:Electric control burglarproof door, Building intercommunication system
- Qingdao Meiya Iron Art Co., Ltd.
- 全国主营:Iron art products
- Shanxi General Group Co., Ltd.
- 全国主营:Large, medium and small sealed Valve Regulated Lead-Acid (VRLA) battery and SLI battery, UPS, car steel spring, tractor, bucket loader etc.
- Chongqing Tianren Stamping Co., Ltd.
- 全国主营:Metal stamping parts, Auto parts.
- Chongqing Bashu Burglarproof Door Co., Ltd.
- 全国主营:Metal roller gate, Burglarproof door
- Cixi Dada Automobile Electric Appliance Co., Ltd.
- 全国主营:Mould fittings.