The prestress sensor is necessary for measurement in monitoring, research and test in the construction of anchors, prestress concrete and prestress Bridges.
The central zone of tensile stress moved to the frenal notch from the pre palate.
拉应力中区由基托前腭部移动到唇系带切迹区。
3
The calculating theory and designing method of pre-stress reinforcement concrete structure plasticity is one of thorny problem that the theory circle and project circle pays close attention to.