The reporter learned from China Railway 14th Bureau Group Co., Ltd., that on the 17th, at a depth of 80 meters on the Ningbo side of the Jintang Undersea Tunnel of the Yongzhou Railway, the builders took 21 days to complete the inspection and replacement of 104 shield knives under 7.8 bar water pressure, marking that the saturated pressure intake technology independently developed by China successfully completed long-term, ultra-high pressure practical tests, and China's deep-buried cross-sea tunnel construction capacity was further improved.

The reporter learned from China Railway 14th Bureau Group Co., Ltd., that on the 17th, at a depth of 80 meters on the Ningbo side of the Jintang Undersea Tunnel of the Yongzhou Railway, the builders took 21 days to complete the inspection and replacement of 104 shield knives under 7.8 bar water pressure, marking that the saturated pressure intake technology independently developed by China successfully completed long-term, ultra-high pressure practical tests, and China's deep-buried cross-sea tunnel construction capacity was further improved.