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Thesoldering tin thread, bar and assistants are used widely in electric producing, instrument and other machines, The customers like products very much.

生产各种型号的焊锡丝、焊锡条、助焊剂和各种低熔点合金产品被广泛应用于电子制造,仪器仪表,机电产品,倍受广大用户的青睐。

Barium sulphate is a kind of chemical substances is very stable, insoluble in water, insoluble in hydrochloric acid and sulfuric acid, melting point's 1580℃.

硫酸钡是一种化学性质非常稳定的物质,不溶于水,也不溶于盐酸和硫酸,熔点1580℃。

Model compounds were synthesized from benzoyl chloride and diamine Ⅰ or diamine Ⅱ in NMP with anhydrous lithium chloride. Structures of model compounds were measured by melting point, FT-IR, element analysis and 〓H NMR. Reaction mechanism was from model reaction.

二胺Ⅰ和二胺Ⅱ分别与苯甲酰氯在含有LiCl的NMP溶液中合成模型化合物,采用熔点,FT-IR,元素分析,〓H NMR等方法对模型化合物的结构进行了表征,根据模型反应确定反应机理。

"Bismuth:a white, crystalline, brittle , highly diamagnetic metallic element used in alloys to form sharp castings for objects sensitive to high temperatures and in various low-melting alloys for fire-safety devices."

铋:白色、晶状、易碎、高度抗磁的金属元素,用于高温敏感物体的合金中,以铸成锋利物件,多种用于防火安全设施的低熔点合金。

Low levels of the crust, melting point 3180 ℃, boiling point 5627 ℃, the relative density of 2053, the external F electronic structure 5d56s2, reaction time will be lost 1-7 electronic, but also can capture an electron, so oxidation number of 0,± 1, 2 , 3, 4, 5, 6 and 7, rhenium with the halogen in the fluorine, chlorine, bromine reaction halides dissolved in water, can dissolve in nitric acid and ammonia hydrogen peroxide solution, but do not dissolve in hydrochloric acid.

地壳中含量很低,熔点3180℃,沸点5627℃,相对密度2053,外围F 电子结构5d56s2,反应时会丢失1—7个电子,也可捕获一个电子,所以氧化数为0、±1、+2、+3、+4、+5、+6和+7,铼能与卤素中的氟、氯、溴反应生成溶于水的卤化物,能溶于硝酸和含氨过氧化氢等溶液,但不溶于盐酸。

While melting at right temperature,it can protect the residual carbon produced in the degradation of PVC,thus increasing the residual carbon amount and the flame retardancy and smoke suppression.

制得的硫酸盐混合物熔点低,在适当温度下熔融时,能有效地保护PVC降解过程中形成的剩碳,从而能提高剩碳率,提高阻燃与消烟性能。

This requirement may be satisfied by the submission of information such as the following: name (generic name, chemical name, code number); Chemical Abstracts Service number if available; description (e.g., appearance, color, physical state); molecular formula and molecular weight; structural formula (including ionic state if applicable); stereochemistry identifying chiral centers, cis-trans isomerism, etc.

该要求可以通过提供下述信息来满足:名称(通用名、化学名、编码等)、化学摘要服务编码、性状描述(如:外观、颜色、物理状态)、分子式和分子重量、结构式、立体化学(找出手性中心、顺式反式异性等)、对映结构体比率(如:外消旋物、规定的异构体、对映异构物和固态形式的混合物)、溶解度概况、分配系数、溶液 pH 值、解离常数、熔点或沸点、折射率、比重。

This requirement may be satisfied by the submission of information such as the following: name (generic name, chemical name, code number ); Chemical Abstracts Service number if available; description (e.g., appearance, color, physical state ); molecular formula and molecular weight; structural formula (including ionic state if applicable ); stereochemistry identifying chiral centers, cis-trans isomerism, etc.

有的话、描述(如:外观、颜色、物理状态)、分子式和分子重量、结构式、立体化学(找出手性中心、顺式贯穿异性等)、对映结构体或固态形式比率(如:外消旋物、规定的异构体、对映异构物和固态形式的混合物)、溶解性档案、分隔系数、溶液pH值、解离常数、熔点和沸点、拆射率、精确重力。

Using cotton seed oil and palm oil, We make the mixed oil which have lower melting point.

选用一级棉籽油和棕榈油为原料,制成熔点较低的调和油,经实验证明,可以代替大豆油,用于普通煎炸操作。

The die drawing process and the main characteristics of oriented polyethylene was reviewed in this paper.

介绍了制备取向聚乙烯的口模拉伸工艺及其特点,该工艺适宜的口模温度为低于树脂熔点10~40℃,拉伸速度一般小于15 m/min。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。