Objective Due to the characteristics of strong permeability and high water content in water-rich sand layer. the poor muck improvement can easily cause accidents such as spout spilling of screw conveyor and mud cake formation on the cutter plate during shield tunneling. thus affecting shield construction efficiency. So it is necessary to study the muck improvement of earth pressure ba... https://www.chiggate.com/used-ross-700mc-bone-in-commercial-meat-tenderizer-online/