With the pressure increasing, the upper plate would spring back to its original place.
随着压力的增强，上面的板快反弹回来原来的位置。
To replace the relief valve disc, hold the upper guide fin and unscrew the diaphragm pressure plate.
要更换安全阀阀瓣，握住上部引导翼，旋下隔膜压力板上的螺丝。
When the upper and lower plate dislocate relatively, the longitudinal strains of structure, the relative displacement at the bottom of the tunnel and the peripheral soil pressure are analyzed.
在地裂缝上、下盘发生相对错动时，对模型结构的纵向应变、结构底部的相对位移以及结构外围土压力等进行监测。
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