鳍

Benefit analysis: This item can produce 1,500tons of overlength anticeptic enamel finned tube,with an income of ￥23,000,000 profit and tax of ￥ 6,800,000 and profit of ￥4,400,000 per year .

效益分析：该项目年产超长防腐搪瓷鳍片管1500吨，销售收入2300万元，利税680万元，利润440万元，投资回收期3年。

The overlength anticeptic enamel spiral finned tube is an enamel heat-transfer element of a new type,which overcomes the shortcomings in using stainless steel for pipe bundles,meets the needs of environmental protection, and has a wide market prospect.

超长防腐搪瓷鳍片管是新一代搪瓷传热元件，改进管束采用不锈钢等金属的缺点，降低成本，延长寿命，外表美观大方，并达到环保要求，市场前景十分广阔。

Any of various herbivorous aquatic mammals of the genus Trichechus, having paddlelike front flippers and a horizontally flattened tail and found in warm coastal waters of Florida, northern South America, West Africa, and the Caribbean.

海牛一种海牛属食草性水生哺乳动物，长有蹼状前鳍，居中扁平的尾巴，产于美国佛罗里达州、南美洲北部、西非和加勒比海地区海岸温暖的水域中

Any of various spiny-finned freshwater fishes of the genus Perca, especially either of two edible species, P.

河鲈任何一种有刺状鳍的鲈属淡水鱼，尤指两种可食用类，北美洲的金鲈和欧洲的河鲈

Any of numerous spiny-finned fishes of the order Perciformes.

鲈形目中多种有刺鳍的鱼。

English Abstract): Thunnus albacares which belongs to Perciformes and Scombridae is a significantly migratory economic species.

中文摘要：黄鳍鲔隶属於鲈形目、鲭科，为重要之洄游性经济鱼种。

Of or relating to the Percoidea,a large suborder of spiny - finned fishes that includes the perch es,sunfishes,groupers,and grunts.

鲈形亚目属于或关于鲈鱼目的，包括河鲈、翻车鱼、石斑鱼和石鲈的针鳍鱼类的大亚目

Of or relating to the Percoidea,a large suborder of spiny - finned fishes that includes the perches,sun fishes ,groupers,and grunts.

鲈形亚目属于或关于鲈鱼目的，包括河鲈、翻车鱼、石斑鱼和石鲈的针鳍鱼类的大亚目

Of or relating to the Percoidea,a large suborder of spiny - fin ned fishes that includes the perches,sunfishes,groupers,and grunts.

鲈形亚目属于或关于鲈鱼目的，包括河鲈、翻车鱼、石斑鱼和石鲈的针鳍鱼类的大亚目

A mammal of the suborder Pinnipedia.

弓鳍鱼科的一个模式属。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。