ERA is a non-state owned hydraulic roof support manufacturer in the People's Republic of China through its wholly-owned subsidiary Zhengzhou Siwei Mechanical & Electrical Equipment Manufacturing Co., Ltd. which is based in Zhengzhou, Henan. ERA produces hydraulic roof supports for longwall coal mining and has established a clientele of coal mining producers primarily located in 13 of China's provinces and autonomous regions.
ERA Mining Machinery Limited was acquired by Caterpillar on November 10, 2011.
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