The List of Companies1. China Railway Construction Heavy Industry Co., Ltd.
2. CREG TBM Germany GmbH
3. Dalian Huarui Heavy Industry Group Co., Ltd. (DHHI)
4. Herrenknecht AG
5. Hitachi Zosen Corporation
6. IHI Corporation
7. Kawasaki Heavy Industries, Ltd.
8. Komatsu Ltd.
9. Northern Heavy Industries Group Co.,Ltd
10. Qinhuangdao Tianye Tolian Heavy Industry Co., Ltd