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- heavy pyridine base 重吡啶碱
- Pyridine bases are widely used in pharmaceutical, pesticide, aromatics, rubber and dyestuff industry. 吡啶碱广泛应用于合成医药、农药、香料、橡胶和染料。
- The application of pyridine bases in the field of pharmaceuticals, pesticide, aromatics, rubber, and dyestuff are introduced. 介绍了吡啶碱类化合物在医药、农药、香料、橡胶和染料等领域的应用。
- It is the main way in industy that pyridine bases are manufactured from carbonyl compound and ammonia using improved ZSM - 5 zeolite as catalyst. 目前,工业上主要以羰基化合物和氨为原料、以改性ZSM-5沸石作催化剂生产吡啶碱类化合物。
- There are two manufacturing methods of pyridine bases: extraction from coal tar and catalytic synthesis from ammonia, formaldehyde and acetaldehyde. 二是从氨和甲醛、乙醛的合成过程中获得。欧盟、美国、日本是主要的生产国,主要采用化学合成法生产;
- Her heavy industry rests on a broad and firm base. 它的重工业有广泛坚实的基础。
- He lugged a heavy handcart along. 他使劲拉走那笨重的手推车。
- He made manful efforts to move the heavy furniture. 他作出勇敢的努力搬动沉重的家具。
- She could only croak because of her heavy cold. 她因患重感冒只能用沙哑的声音说话。
- She will not shove the heavy load onto others. 她不愿意把重担推给别人。
- Giving him a heavy slating will do him good. 狠狠地斥责他一顿会对他有好处。
- How could he get his heavy box up all those stairs? 这么重的箱子他是怎么抬上楼的？
- Heavy taxes indispose a citizen to work hard. 重税于国民不愿意辛勤工作。
- A heavy shower drench the campers. 一阵骤雨把露营者都淋湿了。
- Even an oversight in the design might issue in heavy losses. 设计中那怕是一点点疏忽也可能造成重大的损失。
- Test Method for Pyridine Bases in Cresylic Acid by Direct Titration 直接滴定法测定甲苯基酸中吡淀碱的试验方法
- Joe tried to pull the heavy cart, but to no avail. 乔想拉那部笨重的大车，但是拉不动。
- Heavy traffic poses a problem in many old towns. 交通拥挤是许多旧城镇的难题。
- Industry is a heavy user of electric power. 工业需耗费大量的电力。
- The heavy box landed crash on his head. 沉重的箱子哗啦一声掉到他的头上。
