查询词典 steam-engine

For many years the motive power of trains was steam.

"好多年，火车的动力是蒸汽。"

High temperature gas scour,alkalescent steam attack,and thermal shock will cause the flush corrosion,silica brick corrosion,mousehole,crack and flake of crown.

生产过程中的侵蚀损毁和烤窑维修过程中的人为损害是影响玻璃池窑碹顶安全的主要因素。

The present invention adopts the technical proposal of adopting ZSM-5 mesoporous molecular sieve raw powder with a silicon-aluminum mol ratio SiO2Al2O3 of 20 to 1000 and a weight percentage of 20 to 100 percent as well as at least one caking agent selected from SiO2, clay and Al2O3 to extrude, tablet or spray into shape; then treating for 1 to 8 hours by 0.1 to 3 mol/l of at least one ammonium liquor from ammonium nitrate, ammonium chloride or ammonium sulphate or 0.1 to 8.5 mol/l of at least one acid liquor from muriatic acid, nitric acid, vitriol or acetic acid under a temperature of 20 to 90 DEG C; then using steam to treat for 2 to 15 hours under the temperature condition of 400 to 700 DEG C; using a liquor of 0.1 to 3mol/l selected from at least one of oxalic acid, citric acid or maleic acid under a temperature condition of 20 to 90 DEG C to dip for 2 to 5 hours to obtain the modified molecular sieve catalyst, thus better solving the problems.

本发明通过采用硅铝比SiO2/Al2O3为20～1000重量百分比计20～100％的ZSM-5介孔分子筛原粉与余量的选自SiO2、粘土或Al2O3中至少一种粘结剂挤条、压片或喷球成型；再经过0.1～3摩尔/升选自硝酸铵、氯化铵或硫酸铵中的至少一种铵溶液或0.1～8.5摩尔/升选自盐酸、硝酸、硫酸或乙酸中的至少一种酸溶液在温度20～90℃下处理1～8小时；然后在温度为400～700℃条件下水蒸汽处理2～15小时；再用0.1～3摩尔/升选自草酸、柠檬酸或马来酸中至少一种在温度为20～90℃条件下浸渍2～5小时得所需改性分子筛催化剂的技术方案较好地解决了该问题，可用于甲醇转化制丙烯的工业生产中。

A method for predicting product-yields of naphtha steam cracking was established by means of BP neural network model.

目前，工业上生产乙烯的主要方法是在管式裂解炉中采用热裂解法。

Carbon dioxide is a by-product of steam reforming of methane, propane or naphtha.

二氧化碳是甲烷，丙烷或石脑油的蒸气重整的一个副产品。

This could be prevented by the addition of valve gear to cut off the steam admission on the non-working side of the casing, and probably this is what Napier intended.

这可以防止通过增加阀齿轮切断汽对非工作方面的套管，大概这是什么纳皮尔打算。

It is the only narrow gauge steam passenger train still operating in the world. Some call it "a living industrial museum".

这是世界上唯一还在运营的客运窄轨蒸汽小火车，有人称之为"活着的工业博物馆"。

Once to protect the world famous Industrial Revolution living fossil narrow gauge steam small train's volunteer Luo Chang An gentleman, to protect an old town to continue to step has lived the cruel fate travel.

曾经为保护闻名于世的工业革命活化石窄轨蒸汽小火车的志愿者罗长安先生，为了保护一座古镇继续踏上了生命苦旅。

At 6 a.m. every day, a narrow gauge train with six or seven cars leaves Shixi, a small town in Jianwei County, Sichuan and heads toward the depth of the mountains, puffing white steam.

在四川省犍为县一个名叫石溪的小镇，一辆挂着六七节车厢的小火车每天清晨6点准时从这里发车，喷吐着白雾向大山深处驶去。

This is just so that your computer can connect with your NAS and to your TV to steam media files.

这仅仅是使您的电脑能够连接到NAS和到你的电视蒸汽媒体档案。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。