filter rod滤棒filtern.过滤器；滤色镜；滤光器v.过滤；渗透filter coefficient过滤系数filtering adjuvant过滤助剂filter powersupply滤波电源filter leaf nozzle过滤叶片接口Filter rod ejector发射机filter dehydration过滤脱水filtering accuracy跟踪精度filter pressed oil压滤油filterability test过滤性能试验Filter optimization滤波器优化