The target molecule was synthesized through using chiral reagent, reduction of double bond, hydrogenolysis and hydrolysis of ester group.
之后，经引入手性试剂，双键还原，氢解，水解酯基得到目标产物的合成路线。
A coal mining method with a combination of a slicing and caving, a double benefit in control of water conducted crack zone development and in reduction of coal production cost can be obtained.
对厚煤层采用分层与放顶煤相结合的采煤方法，既可控制导水裂缝带的发育高度，又可降低生产成本。
Cast hopper. The double layer design, noise reduction;
投料斗双层设计，减少噪音；
Objective: To analyze the clinical effect of intercondylar fracture of humerus with open reduction and internal fixation with tension band or double plate.
目的：分析手术复位钢针张力带固定和内外侧双钢板固定治疗肱骨髁间骨折的临床疗效。
The invention relates to a reduction gearbox of an electric tool, in particular to an assembling structure of double-speed impact electric drill gear reduction gearbox.
本发明涉及一种电动工具的减速箱，具体地说是一种双速冲击电钻齿轮减 速箱的装配结构。
The actual control further shows that the control strategies combining double loops torque compensation allow an effective reduction in surplus of the system and better control of steady-state error.
实际控制效果进一步表明，双环与力矩补偿相结合的复合控制策略可有效减小系统多余力矩，控制稳态误差。
Biocatalytic reduction of the carbonyl groups or the carbon-carbon double bonds of the compounds has been utilized as a method for transforming the prochiral substrate into chiral product.
生物催化的还原反应能使分子内的羰基或碳-碳双键立体选择性的还原，将潜手性底物转化为手性产物，在不对称合成中有着重要的作用。
Baosteel's double cold reduction mill is the first DCR line introduced from abroad.
宝钢二次冷轧机组是国内引进的第一条二次冷轧机组。
Methods 39 cases of the distal humerus fracture type-C underwent open reduction and internal fixation with double plate.
方法本组共应用双钢板内固定治疗C型肱骨远端骨折39例，并随访分析疗效。
The half-wave potentials of the first and second oxidations and first reduction for double-deckers of the tervalent rare earths are dependent on the size of the metal center.
还可以观察到第一和第二氧化过程的半波电位与中心金属的离子半径呈线性关系。
With posterior elbow incision, all cases were treated in open reduction with double-plate screw fixation, also with early functional exercises.
采用肘后正中切口，行切开复位双钢板螺钉内固定治疗。早期进行功能锻炼。
In China, only Baosteel has ability to produce this product using the double cold reduction (DCR) technology.
目前国内只有宝钢采用二次冷轧(DCR)技术进行生产。
In China, only Baosteel has ability to produce this product using the double cold reduction (DCR) technology.
目前国内只有宝钢采用二次冷轧(DCR)技术进行生产。
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