filter hut滤波器盒filtern.过滤器；滤色镜；滤光器v.过滤；渗透filtering candle滤用空烛filter amplifier滤波放大器filter diaphragm滤膜filterable stage滤过阶段filter paper box滤纸箱filtering method过滤法filteriscan tube扫描管filter structure渡波器结构filterable agent可滤过物质, 过滤剂filter technique滤波技术