| 摘要 |
A lubricant for sealing of tunnel boring gate between inner envelope of tail unit of tunnel boring complex and reinforced-concrete rings of tunnel contains low-molecular rubber and oil base as a part of petroleum oil or synthetic oil, or oil, or mixtures thereof, concentrated by modified bentonite. Additionally it contains the stack of fillers, which consists of barium sulfate, calcium carbonate, and hydrated magnesium silicate. |
