在过滤器的前后各安装一个压力表,A表和B表。在介质过滤的过程中,连续记下两表的读数x_a、x_b。例如我们曾对一台装置作了记录,如表1所示。从表中的读数可以发现,压力表的读数进口处x_a总大于出口处x_b。当过滤器被介质中的杂质所堵时,A表的读数逐 Before and after the filter to install a pressure gauge, A and B table. In the process of media filtration, two consecutive readings of the table x_a, x_b. For example, we have a record of a device, as shown in Table 1. From the table readings can be found, the pressure gauge readings entrance x_a is always greater than the exit x_b. When the filter is blocked by the impurities in the medium, the reading of the A meter is in progress