回流

The yield of the 3, 4-dihydropyrimidine-2(1H)-one was up to 95.4% under mole ratio of anisaldehyde, methyl acetoactate and urea is 1:2:5, ion-exchange membrane is 3 g, ethyl alcohol as solvent and refluxing for 2 h.

当对羟基苯甲醛、乙酰乙酸甲酯与脲的摩尔比为1：2：5，乙醇作溶剂，3 g离子交换膜，回流2 h，产物收率达95.4%。

The revisement of antidromic dorsal interosseous artery island flap could increase vein reflux,improve rate of success.This flap is an ideal therapy to treat hand soft tissue defect.

改进的骨间背侧动脉岛状皮瓣增加了皮瓣静脉回流，提高了移植皮瓣成活率，是修复手部软组织缺损较理想的方法。

Transfer efficiency of a solder paste related to aperture area ratio and its effect on reflowed bump co-planarity.

图5，锡高转移的效率与孔面积比率及它对回流峰共面度的影响。

Figure 5 shows the transfer efficiency of a solder paste with respect to aperture area ratio and the resultant effect on reflowed bump co-planarity.

图5，锡高转移的效率与孔面积比率及它对回流峰共面度的影响。

The purpose of the study is to investingate the feasibility of closed-microwave method instead of traditional aqua regia hotplate reflux method for heavy metal determination in soil.

中文摘要本研究利用密闭微波法消化土壤，并以火焰式原子吸收光谱法分析镉、铜、铅、锌四种金属元素，目的在探讨以密闭微波法取代传统王水热板回流消化法，测定土中重金属之可行性。

After removed ethanol, the solids was dissolved by 0.25% hydrochloric acid, After decolorizated under acidic conditions, the solution was transferred into alkaline, then alkaloids were eluted from the aqueous layer by using D101 macroporous resin.

回流除去乙醇后用0.25%盐酸复溶，在酸性条件下脱色后再将溶液调成碱性，经D101大孔树脂洗脱分离得到总生物碱。

Arterialization of the outflow venous system may induce this condition, and result in impairment of arteriovenous access function, disabling upper extremity edema, violaceous discoloration and hyperpigmentation, ulceration of the skin, and in advanced cases, gangrene formation of the fingers and neuralgia.

原因可由前臂与手掌回流静脉产生动脉化而造成，同时动静脉管失去透析功能，上肢肿胀呈蓝紫色或色素沈著的变化，有时会形成皮肤溃疡，在严重的病例甚至会造成手指坏疽变化与神经痛。

If a water run vacuum aspirator is used, irregularities in the water flow may cause a backflow of air or water into the vacuum flask, introducing contaminants to the filtrate.

如果水运行外太空使用中的不正常现象水流可能会导致回流的空气或水进入保温瓶介绍污染物的滤液。

Including an auxiliary line consisting of an approved backflow preventer and water meter.

包括一个辅助管线，由一个通过认证的防回流阀和水表构成。

The assembly shall include an auxiliary bypass line consisting of an approved backflow preventer and water meter.

这种总成应该包括一个由通过认证的防回流阀和水表构成的辅助旁路管道。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。