Tianjin yiheng casting co., ltd

Tianjin Yanshan Crankshaft Casting Co., Ltd. (Tianjin Shangde Metal Products Co., Ltd.)

Baoyi Foundry Group Company

Tianjin qinmeida industry co., ltd

Tianjin Rongheng Group Company Limited

Tianjin Jin Quan Foundry Co., Ltd.

Tianjin Tian zhong Jiang Tian heavy industry co., ltd

Tianjin faw Toyota engine co., ltd.

CNR Tianjin Locomotive and Rolling Stock Machinery Factory