The tow processes of reducing 9-fluorenylformaldehyde to 9-fluorenyl-methanol are studied by using metal hydride and formaldehyde. The evaluation of the technics is given at last.
阐述了分别用金属氢化物、甲醛作还原剂将9-芴甲醛还原为9-芴甲醇的工艺，并对工艺技术进行了评价。
Injection process of machining technics demanding, the demand is higher, metal material strength relative to some low.
注射工艺苛刻、机加工工艺要求较高，相对于金属材料强度有些低。
This paper summarize principle and technical characteristics of precession welding machine, and emphases on precession welding technics of thin metal wire on pellicular PCB base?
概述微点焊接的工作原理和技术特点，以及用于薄膜铂电阻温度传感器中的薄膜基板上细小金属引线的微点焊技术。
The theory and technics of recovering metal zinc from the hot galvanizing scrap by vacuum distillation are discussed. The calculation and industrial experiment show the feasibility of this method.
本文对热镀锌渣真空蒸馏回收金属锌的原理和工艺进行探讨，理论计算和工业试验均证实该法的可行性。
But modern times, many technics have quit the mainstream stage of history for various reasons, and are replaced by metal surface technics that will adapt to contemporary society.
但到了现代，由于各种原因，许多工艺已经退出历史主流舞台，取而代之的是更适合现代社会的金属表面工艺。
In addition, dialectical relation between jewelry design and metal surface technics is discussed, and the idea of "disclosing technics by design, upgrading design by technics" is advanced definitely.
并对首饰设计与金属表面工艺的辩证关系进行了论述，明确地提出了“用设计揭示工艺，用工艺提升设计”的理念。
The technics of purifying Sc metal in vacuum distilling with coarse Sc metal which is made by ScF3deoxidized by Ca at heated condition.
介绍了用氟化钪钙热还原得到的粗金属钪为原料，通过真空蒸馏净化制取纯金属钪的工艺过程及其技术参数。
The technics of purifying Sc metal in vacuum distilling with coarse Sc metal which is made by ScF3deoxidized by Ca at heated condition.
介绍了用氟化钪钙热还原得到的粗金属钪为原料，通过真空蒸馏净化制取纯金属钪的工艺过程及其技术参数。
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