Grouting Kev tsim kho hauv qhov tob hauv qhov tob, qhov tob, mines, kev txuag dej thiab cov tsev
Txawm hais tias nyob rau hauv av reinforcement los yog underground excavation tej yaam num, peb tag nrho cov dav hlau grouting cog tau cog lus los muab cov cuab yeej technology thiab kev txhawb nqa zoo heev los xyuas kom meej tias peb cov neeg muas zaub tuaj yeem ua tiav lawv cov hom phiaj.