filter rod滤棒filtern.过滤器；滤色镜；滤光器v.过滤；渗透filtering efficiency过滤效率filter plugging test过滤堵塞试验filter time constant滤波器的时间常数filter out the facts泄露出去事实真相filter transformator滤波器变压器Filter graph manager过滤器图管理器Filtering Processing滤波处理filter configuration滤池构型filtering oil engine滤油机filter press blanket压滤机滤布