天然自净化 natural self-purification
自我净化 self-purity ; self-purification
自净化水体 self-purification waterbody
自净化扩散泵 self purifying diffusion pump
自净化功能 self-purifying function
自净化油箱 self-decontaminating gasoline tank
自净化作用 self-cleaning action
汞自动净化器 automatic mercury cleansing apparatus
自然净化 self-purification ; natural purification ; Nature's Cleansing
自然界中的许多矿物自身赋有容纳和稳定有害物质的自净化能力，可用于重金属类污染物的治理。
Many minerals in nature have the self-purification capacity to hold and stabilize deleterious contaminant, which can be used to deal with heavy metal contaminants.
过滤孔板在使用时能自净化，解决了目前镁熔体过滤中， 常易发生堵塞的问题，极大的提高劳动生产率。
The block can be eliminated in the filter of magnesia fused mass at present because the filter orifice plate can be self-purified in use, accordingly the labor productivity is improved greatly.
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