filtermask过滤式防毒面具filtern.过滤器；滤色镜；滤光器v.过滤；渗透filter paper drying oven滤纸干燥箱filtering of information信息过滤filtered Poisson process过滤泊松过程filtered particle method滤过粒子检验法filter funnel of ceramic陶瓷过滤漏斗filtering transformation过滤转换filter transfer function[计] 滤波传递函数filter/voltage ripple滤波器／电压纹波filter type gas analyzer滤光片式气体分析仪filter with platinum net带白金丝网的过滤器