ZYS takes the remanufacturing head start of shield tunneling machine in china Recently, ZYS. and China railway tunnel group jointly held Tunnel Boring Machine remanufacturing main bearing usage assessment meeting in Guangzhou. ZYS successfully passed the expert group evaluation for Guangzhou metro line No. 4 south 5 standard items project of Tunnel Boring Machine remanufacturing assort main bearing, which makes ZYS. become the first domestic through industry evaluation enterprise of Tunnel Boring Machine remanufacturing main bearing. It marks that firstly break Tunnel Boring Machine main bearing remanufacturing technology. The relevant responsible officer of ZYS introduce, Since last year's computer use the complete set of Tunnel Boring Machine remanufacturing main bearing which the enterprise assort for the project, so far it has been tunnelling 1.5 kilometers on the complex condition of Guangzhou metro line No. 4 south 5 standard items.