Exhibit 21

SUBSIDIARIES OF BUCYRUS INTERNATIONAL, INC.

Corporate Name	State/Country of Incorporation
BI Hong Kong AFC Manufacturing Holding Co. Ltd.	Hong Kong
Boonville Mining Services, Inc.	Delaware
Bucyrus (Africa) Surface (Proprietary) Limited	Republic of South Africa
Bucyrus Electrical Service (Proprietary) Limited	Republic of South Africa
Bucyrus Mechanical Service (Proprietary) Limited	Republic of South Africa
Bucyrus America, Inc.	Pennsylvania
Bucyrus Virginia Inc.	Virginia
Bucyrus Botswana (Proprietary) Limited	Botswana
Bucyrus (Brasil) Ltda.	Brazil
Bucyrus Canada Limited	Ontario
Bucyrus Canada Acquisition, Ltd.	Alberta
Bucyrus Colombia S.A.S.	Colombia
Bucyrus Equipamentos de Mineracao Ltda.	Brazil
Bucyrus Equipment, Inc.	Delaware
Bucyrus Central Asia LLC	Mongolia
Bucyrus Field Services, Inc.	Delaware
Bucyrus Mexico, S. de RL. de CV.	Mexico
Bucyrus Services Mexico S. de RL. de CV.	Mexico
Bucyrus Holdings GmbH	Germany
Bucyrus Germany Holdings GmbH	Germany
Bucyrus HEX GmbH	Germany
Bucyrus Europe GmbH	Germany
000 Bucyrus Mining	Russian Federation

000 Bucyrus Ukraine	Ukraine
Bucyrus Africa Underground (Proprietary) Limited	Republic of South Africa
Bucyrus Czech Republic, a.s.	Czech Republic
Bucyrus Europe Holdings, Ltd.	United Kingdom
Bucyrus Europe Limited	United Kingdom
Halco Holdings Limited	United Kingdom
Halco Group Limited	United Kingdom
Halco Rock Tools Limited	United Kingdom
Halco Drilling (Ireland) Limited	Ireland
HAS Drilling Equipment (Proprietary) Limited	South Africa
White Line Plant Ltd.	United Kingdom
Bucyrus (Langfang) Machinery Co., Ltd.	People’s Republic of China
Bucyrus Polska Sp. z o.o.	Poland
Bucyrus UK Limited	United Kingdom
DPM Gesellschaft fur deutsch-polnischen Maschesenhandel und Leasing GmbH	Germany
Bucyrus (Huainan) Machinery Co. Ltd.	People’s Republic of China
Tangshan DBT Machinery Co., Ltd.	People’s Republic of China
Bucyrus India Private Limited	India
Bucyrus Industries, Inc.	Delaware
Bucyrus International (Chile) Limitada	Chile
Bucyrus International Hong Kong Limited	Hong Kong
Bucyrus International (Peru) S.A.	Peru
Bucyrus (Mauritius) Limited	Mauritius
Bucyrus Mining China, Inc.	Delaware
Bucyrus NHL Mining Equipment Co. Ltd.	People’s Republic of China
Bucyrus Mining Equipment, Inc.	Delaware

Bucyrus MT, Inc.	Delaware
Bucyrus Mexico LLC	Delaware
Equipos de Acuna SA de CV	Mexico
Bucyrus Wisconsin Properties, LLC	Delaware
BWC Gear, Inc.	Delaware
BWP Gear Inc.	Delaware
Hypac Holdings, Inc.	Delaware
Hypac (Tianjin) International Trading Company Limited	China
O&K Orenstein & Koppel Limited	United Kingdom
PT Bucyrus Indonesia	Indonesia
Superior Highwall Holding, Inc.	Delaware
Superior Highwall Miners BV	Netherlands
Superior Highwall Miners, Inc.	Delaware
Western Gear Machinery Co.	Delaware
Equipment Assurance Limited	Cayman Islands
Wisconsin Holdings Pty. Ltd.	Australia
Bucyrus (Australia) Surface Pty. Ltd.	Australia
Bucyrus Australia Underground Holdings Pty. Ltd.	Australia
Bucyrus Australia Underground LAD Pty. Ltd.	Australia
Bucyrus Australia Underground Pty. Ltd.	Australia
Bucyrus Mining Australia Pty. Ltd.	Australia
O&K Australia Pty. Ltd.	Australia