飞鹰伦理影院

<form id=dimFCuoxL><nobr id=dimFCuoxL></nobr></form>

<address id=dimFCuoxL><nobr id=dimFCuoxL><nobr id=dimFCuoxL></nobr></nobr></address>

得利特（北京）科技有限公司

? ? ? 客服热线：010-80764046

亞新(中國)

亞新(中國)

副標題

測定油品粘度及計算粘度指數對生産運行的意義

发表时间：2019-01-03 16:55

（1）潤滑油的牌號，大部分以油品40°C運動粘度的平均值來劃分。

（2）粘度是潤滑油zui重要的指標之一，正確選擇一定粘度的潤滑油，可保證發電機和汽輪機組穩定可靠的運行狀態。隨著粘度的增大，會降低發動機的功率，增大燃料消耗。如果粘度過大，會造成啓動困難，機組振動；如果粘度過小，會降低油膜的支撐能力，形不成良好的油膜，使摩擦面之間不能保持連續的潤滑層，增加機器的磨損。

（3）潤滑油的粘度指數是國際上通用的一種工業用黏溫參數，可用來比較37.78-98.89°C（40-100°C）溫度間隔內潤滑油的粘度溫度關系的斜率。

（4）因爲潤滑油的粘度指數與其化學組成有關，如各類烴中以烷烴的粘度指數zui大，正構烷烴又大于異構烷烴，環烷芳香混合烴比相應的環烷烴和芳香烴粘度指數小。另外，環數的多少，支鏈側鏈分支的多少，長短等都影響粘度指數。故利用計算所得的粘度指數，可比較、評定和改善潤滑油的黏溫性，有著一定的使用意義。

上一篇測定石油破乳化時間需注意事項

下一篇電導率儀使用注意事項

文章分類：公司新聞

分享到：

地址：北京市昌平區新元科技園E座206

郵箱：delitekj@126.com

電話：010-80764046；010-80764056

分享網站

?

開雲官方網頁版 | 時博手機網頁版 | 江南網頁版 | 拼搏在線首頁 | 半島電競 | 華億平台 | 米蘭官方網頁版 | 安博站·官方版網站登錄入口 | 開雲手機平台 |

DANGEROUS PLACE ON THE SUWO NADA. DANGEROUS PLACE ON THE SUWO NADA. "Richard, it helps the wrong way; I know that story. After hearing that story she is, yes! the one woman of all women to send me this." Another day arose. A courier brought passes for our three or four other wounded to go home as soon as they were fit to travel, and by night they were all gone. At early bedtime came two surgeons of high rank all the way from Johnston's army up in Mississippi. General Austin had asked this favor by telegraph. Harry had been gone thirty-six hours, and Ferry was just asking if he had not yet got back, when the surgeons came in to the room. A pleasantry or two consumed a few moments. Then the surgeon in charge of us told of a symptom or two, to which they responded only "hmm," and began the examination. Miss Harper sent her three nieces away. I lay and listened in the busy stillness. Presently one of the examiners murmured with a certain positiveness to the other, who after a moment's silence replied with conviction; Miss Harper touched our surgeon's arm inquiringly and he looked back in a glad way and nodded. Miss Harper nodded to me; they had located the ball! Now the conversation turned upon men and events of the day, while one of the visitors, with his back to the patient, opened a case of glittering knives. Presently the professional heads came so close together as quite to hide the patient; they spoke once or twice in a manly soothing tone. Miss Harper stroked my temples to keep me down, one of the busy ones spoke again, and lo! the thing was done, there was the ball in the basin. As the men of blood sped through their kind after-work the news flew to and fro; Camille wept,--since she could not hurrah,--Cécile told Charlotte, the heavenly-minded Estelle was confirmed in her faith, Miss Harper's black eyes, after a brief overflow, were keener and kindlier than ever, and as the surgeons spoke the word "done," Ferry asked again if Harry had not got back yet. Pretty soon Harry did arrive, with news of great feats by our cavalry against our old enemy Grierson, in which Austin's brigade had covered themselves with glory, and in which he had had his own share; his hand was swelled as big as his heart. In all the Confederacy no houseful went to sleep that night in sweeter content. I sank into perfect bliss planning a double wedding. "Well, I can name several! I don't call Scott Gholson anybody, but there's Major Harper--No, I'm not talking too loud, Ned isn't hearing a word. Major Harper's so hot against this thing that he brought it up, with me, yesterday on the battlefield." Mrs. Flack held the greater part of herself in a semicircle of red arm. "You are a one," she declared. Then she looked at Mr. Flack, who sat unmoved. "Why don't you laugh. It would do you good. You take everything so serious." "Certainly, captain." The final defeat of polytheism proved, in some respects, an advantage to Neo-Platonism, by compelling it to exchange theological controversy for studies which could be prosecuted, at least for a time, without giving umbrage to the dominant religion. At Alexandria the new spiritualism was associated, on genuinely Platonic principles, with the teaching of geometry by the noble and ill-fated Hypatia. In all the Neo-Platonic schools, whether at Rome, at Alexandria, at Constantinople, or at Athens, the writings of Plato and Aristotle were attentively studied, and made the subject of numerous commentaries, many of which are still extant. This return to the two great masters of idealism was, as we have already said, the most valuable result of the metaphysical revival, and probably contributed more than any other cause to the preservation of their works amidst the general wreck of ancient philosophical literature. Finally, efforts were made to present the doctrine of Plotinus under a more popular or a more scientific form, and to develope it into systematic completeness. [Pg 50] Beyond the "deadening" came a horde of pursuing rebels, firing and yelling like demons. The sight and sound swelled the boys' hearts with the rage of battle. "Why, what in the world have I got on that's military?" asked Billings, looking himself over. "Stephen, you were not used to answer me thus. I charge you, by the authority and love of thy mother, and in the name of the blessed saints, to tell me what has happened." HoME 飞鹰伦理影院ENTER NUMBET 0041717cz.net.cn
www.cnscsc.org.cn
indiaembassy.org.cn
www.hznyedu.cn
irobotedu.cn
www.shuishao.com.cn
pjhz.com.cn
www.91gzkj.com.cn
www.tjaojin.com.cn
szzk126.com.cn