词汇	precast segment
释义	precast segment 预制节段
随便看	self-purging cell self-purging redundancy selfpurging trap self purging trap self-purging trap self purging waste pump self-purging waste pump selfpurification self purification self-purification self-purification ability self-purification ability of environment self-purification activity selfpurification amount Self-purification capacitor self-purification capacity self-purification characteristic self-purification characteristics Self-purification coefficient self purification constant self-purification constant self-purification experimentation self-purification factor self-purification of water body self-purification of waters