nickel base alloy powder--determination of silicon content--gravimetric method after dehydration by per- chloric acid

studies on fine absorption spectrum of cerium ion in chloric acid and its analytical application

铈盐酸溶液的精细吸收光谱的研究及应用

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studies on fine absorption spectrum of neodymium ion in chloric acid and its analytical application

钕盐酸溶液的精细吸收光谱的研究及应用

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thank you for your letter regarding the improper storage of chloric acid.

感谢你的有关氯酸储存不妥的来信。

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effects of different irrigation time of groundwater on growth and yield of rice

地下水不同灌溉时间对水稻生长发育及产量的影响

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the optimal irrigation time and period for sunflower were designed.

确定了向日葵最佳灌水次数和灌水时段。

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they had developed several alternative systems, they told me, including one that used a rotating mirror and a high-speed projector.

他们告诉我，他们还造出了好几种替代系统，包括展出的那个具有旋转的玻璃球和高速放映机的完成品。

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research school of functional ecology

应用生态学研究所

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without it, as they report in functional ecology, their animals lived for an average of 8. 8 days. with it they lived for 13. 5 days.

他们在《机能生态学》杂志上报道说，没有了热量限制，轮虫的平均生命期为13.5天。

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structure design on separated metro station mining by the method of pile-beam-arc

分离岛式暗挖车站的洞桩法结构设计

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application of anchor-pile beam counterforce device in static loading test

锚桩横梁反力装置在静载试验中的应用

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reinforced concrete pile--beam frame structure adopted for supporting foundation pit

钢筋混凝土桩-梁框架在基础坑支护中的应用

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automatic tracking system in narrow-gap welding based on planar array ccd image processing

基于面阵CCD图象处理的窄间隙焊自动跟踪系统

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signal disposal and control tactics of welding torch height based on arc sensor in narrow-gap welding

基于电弧传感窄间隙焊枪高度跟踪的信号处理及控制策略

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narrow-gap welding and new research progress

窄间隙焊及其新进展

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narrow-gap welding for inclined end face of special crane rail

斜端面特种起重轨的窄间隙电弧焊

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heredity of characteristics of welding method in narrow-gap welding

窄间隙焊接技术中焊接方法特性的遗传

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realization of ultra-narrow gap welding with flux strips constraining arc

焊剂带约束电弧超窄间隙焊接的实现

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error analysis of automatic tracing system for narrow gap welding with measures of error reduction

窄间隙焊自动跟踪系统的误差分析及减小误差措施

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application of narrow gap welding technique in thick-wall hydrogenation reactor;

分析了加氢反应器堆焊层裂纹的成因与对使用的影响。

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controlling strategy for leading sensing automatic tracking system in narrow-gap welding

传感导前式窄间隙焊自动跟踪系统的控制策略

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