大中矿业：公司的盾构机经检修后，可以重复使用

Core Viewpoint - The company currently owns three shield tunneling machines, which can be reused after maintenance [1] Group 1 - The company has a total of three shield tunneling machines: one in Hunan and two in Sichuan [1] - The shield tunneling machines can be reused after undergoing maintenance [1]