Used ion-exchangefilter element could be recycled by producer and no pollution will happen.
用过的离子交换树脂滤芯可由厂家再生处理，不会对环境造成污染。
2
Three values representing the filter for the default exchange rate type are also created in the AA_Prompts_Map parameter map as described in section 2.1.
Four types of linear phase fir filters are introduced at first, then of this basis a notch filter for processing ECG signal is designed by using multiple exchange algorithm.