作为国内重型机械制造业“龙头老大”的中国第二重型机械集团公司 ,近年来又向工程机械制造业进军。自去年与国外某著名公司成功合作后 ,不久前又与该公司“第二次握手” ,双方签署了昆明 3 6 5 5ｍ隧道掘进机制造合同。2 1世纪 ,随着中国基础设施的大规模建设 ,尤其是西部大开 As China’s second-largest heavy machinery group company, which is the “biggest leader in domestic heavy machinery manufacturing industry”, it has entered the construction machinery manufacturing industry in recent years. Since the successful cooperation with a well-known foreign company last year, the company also recently held a “second handshake” with the company and the two parties signed a Kunming 3 65m tunnel boring machine manufacturing contract. In the 21st century, with the large-scale construction of China’s infrastructure, especially in the western region,