求翻译：正常运行中，出浆压力下降，进出口压差增大，出浆量减少，说明筛板已部分堵塞，此时可关闭出浆阀门，待出浆压力达到进浆压力后，逐步打开出浆阀，调节进出浆压差在0.06-0.08Mpa范围内。如果此法不能清除堵塞，则必须停机清理。是什么意思？

In normal operation, a loss of pressure grouting, import and export the pressure differential increases, less pulp, description screen plate was partially blocked, then close out of the slurry valve, be out of the pressure Grouting pressure reaches into pulp after gradually opens out of the slurry valve, regulate and out of the slurry in the 0.06-0.08Mpa range of differential pressure. If this method does not clear the blockage, you must stop clean.