大中矿业：公司现拥有3台盾构机
Group 1 - The company currently owns three shield machines: one in Hunan and two in Sichuan [1] - The shield machines can be reused after maintenance [1]
Group 1 - The company currently owns three shield machines: one in Hunan and two in Sichuan [1] - The shield machines can be reused after maintenance [1]