The shrimp dumpling ha gau and barbecued pork bun cha siu bau , both prepared by steaming , are made with diametrically different fillings and wrapping ingredients that create their distinctive tastes and unique textures 是次比赛所选四款点心均有独立个性。虾饺和叉烧包虽同属蒸笼类别，但因选用不同馅料和外皮，外观和口感的要求亦各有不同。
Milk flavor small bread is similar to knife cut steamed bun ; knife cut steamed bun is made by steaming , while milk flavor small bread is made by baking , can make the quality guarantee period of the products get maximum extension 乳香小面包形似刀切小馒头，刀切小馒头是用蒸煮而成，而乳香小面包是经焙烤而成，能使制品的保质期得到最大程度的延长。
With the yield of concentration of sulfur compound as the evaluation index , the contrast between onion essential oil and onion oleoresin from dried onion powder by steam distillation , solvent extraction and soxhlet method was studied 摘要以洋葱粉为研究对象，以含硫化合物浓度为评价指标，采用水蒸汽蒸馏、溶剂萃取法和索氏提取法进行洋葱精油与油树脂的比较研究。
1 the rolls are made of chilled alloyed cast iron , their working surfaces are of high hardness and wear - resistant . the working temperature of the bored rolls is controllable by steam or cooling water that pass through them thus , to meet the requirements of milling process 1辊筒用合金冷硬铸铁制成工作表面具有较高的硬度，耐磨耐用。辊筒内腔可通如蒸汽或冷却水以便调节辊筒的工作温度，以满足炼胶工艺的要求。
They operate with fuel - fired boilers for power generation . so far , the electricity generated by steam turbine is about 80 % in all kinds of electricity in the world . steam turbines are the most power mechanical equipment in modern countries 在现代火电厂和核电站中，汽轮机驱动发电机生产电能，全世界由汽轮发电机组发出的电量约占各种形式发电总量的80左右，所以汽轮机是现代化国家中重要的动力机械设备。
Abstract : the causes for low efficiency of the heater in no . 2 crude unit of jpc refinery are described and analyzed including water leaking of steam soot blower , dew point corrosion caused by steam , soot deposits in convection chamber owning to poor soot blowing , high flue gas temperature , no heat recovery of flue gas , and poor performance of insulation lining , etc . by using sonic soot removing system , flue gas recovery system , spray coating of fiber and rock wool , as well as adjustment of flow scheme accordingly in the technical revamping . the dew point corrosion is completely eliminated , the insulation performance is improved , the heat loss is reduced by 1 . 25 % , the flue gas temperature is reduced to about 170 , and the heater efficiency is increased from 83 % to more than 90 % 文摘:分析了金陵石油化工公司炼油厂二套常减压装置加热炉存在的因蒸汽吹灰器漏水,蒸汽引起露点腐蚀及吹灰效果差造成对流室积灰，排烟温度高，烟气热量未回收利用以及炉子保温衬里效果差等问题，提出采用声波除灰系统、烟气回收系统、纤维喷涂和岩棉喷涂及相应的流程调整等改造措施.测定结果表明，本次技术改造解决了因蒸汽吹灰器漏水所造成的露点腐蚀问题，提高了保温效果，减少散热损失1 . 25 % ,排烟温度降至170左右，装置的炉效率由83 %左右提高到90 %以上
The causes for low efficiency of the heater in no . 2 crude unit of jpc refinery are described and analyzed including water leaking of steam soot blower , dew point corrosion caused by steam , soot deposits in convection chamber owning to poor soot blowing , high flue gas temperature , no heat recovery of flue gas , and poor performance of insulation lining , etc . by using sonic soot removing system , flue gas recovery system , spray coating of fiber and rock wool , as well as adjustment of flow scheme accordingly in the technical revamping . the dew point corrosion is completely eliminated , the insulation performance is improved , the heat loss is reduced by 1 . 25 % , the flue gas temperature is reduced to about 170 , and the heater efficiency is increased from 83 % to more than 90 % 分析了金陵石油化工公司炼油厂二套常减压装置加热炉存在的因蒸汽吹灰器漏水,蒸汽引起露点腐蚀及吹灰效果差造成对流室积灰，排烟温度高，烟气热量未回收利用以及炉子保温衬里效果差等问题，提出采用声波除灰系统、烟气回收系统、纤维喷涂和岩棉喷涂及相应的流程调整等改造措施.测定结果表明，本次技术改造解决了因蒸汽吹灰器漏水所造成的露点腐蚀问题，提高了保温效果，减少散热损失1 . 25 % ,排烟温度降至170左右，装置的炉效率由83 %左右提高到90 %以上
