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一种美国水生植物，叶肾形或圆心形，佛焰苞具有短的柄或无柄；通常扎根在池塘和水沟的底部淤泥中。
American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches.
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烧嘴混合炉头具有短焰，宽范围，非常稳定燃烧的特点。
The NOZZLE MIX burners feature short flames, wide turndown ranges and very stable combustion.
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