The results showed that the DDST abnormal rate of severe iodine deficiency group was obviously higher than that mild and control group;

The use of DDST in china: Retrospect and Prospect

丹佛智能发育筛选检查（DDST）在国内的应用：回顾与瞻望

DDST results and analysis of 397 children in IDD area

397名碘缺乏病区儿童DDST测试结果分析

Application of DDST in assessing development of infants

应用丹佛发育筛查法评价婴幼儿发育状况

Deciduous Chinese shrub or small tree with often trilobed leaves grown for its pink-white flowers.

中国种每年落叶灌木或小型树种，三裂片树叶，粉红到白色花冠。

The operation condition of a series feedback type of de-Q circuit is analysed in detail and the main design formula is deduced. The new practical circuit, the solid state scheme of the parallel feedback type de-Q circuit for high voltage and high power is also presented.

本文详细地分析了串联反馈型de-Q电路的工作状态，推导出主要的设计公式，给出了新的实用电路，提出了高压大功率的并联反馈型de-Q电路的固态化方案。

The advantage of PIN low impedance with assembly method is proposed, and an improved method for de-Q circuit design is also presented.

提出了采用组合式调制器达到PFN低阻抗的优点，对de－Q电路设计也提出了改进意见。

A Solid-state Feedback de-Q Charging Technology of High Power and High Voltage Line Type Pulse Modulator

大功率调制器的固态反馈型de-Q充电技术

Internal thread tapping is one of the most demanding machining operations.

内螺纹加工在机械加工中占有重要地位。

Radial Extrusion Mould for the Internal Thread Spline

内螺旋花键径向挤压模

Parallel pins with internal thread

GB/T120-1986内螺纹圆柱销

An Experimental Exploring on Machining Internal Thread of Hardened Steel by EDM

电火花加工淬火钢螺纹孔的实验探讨

Compressed Internal Thread and Its Application in Electronic Products

挤压内螺纹在电子产品中的应用研究

Study on Processing Method for Cold Extrusion in Internal Thread of Knuckle Axis

挂钩轴内螺纹冷挤压成形方法研究

The CAT System Software Design for Internal Thread of Joint

油套管接头螺纹CAT系统软件的设计与开发

The practice shows the measurement is efficient on overcoming the defect of internal thread.

生产实践证明，相应的纠正措施对克服内螺纹缺陷起到明显的效果。

Component parts with bore such as pin valve, internal thread, oil pipe take up a large proportion in the oil industry, chemical industry and modern manufacturing industry.

孔类零件如针阀体、内螺纹、油管等在石油、化工和现代制造业中占有相当大的比重。

Design of the Injection Mould with Eject Plate& Screw Rod Structure for Auto_demoulding of Internal Thread

推板螺杆式自动脱内螺纹注射模设计

This paper discusses the mechanical, hardware, software configurations and principles of CAT system for joint internal thread in details.

详细介绍了油管接箍内螺纹计算机辅助测量系统的机械、软硬件结构与原理。

To solve the disadvantage of traditional contract measurement method for internal thread, a non-contract measuring method based on the theory of fiber-optic sensor was introduced.

针对传统内螺纹参数接触测量方法的不足，提出采用光纤位移传感的方法实现内螺纹参数的非接触测量。

The utility model relates to a tool for measuring internal thread depth of mechanical parts.

本实用新型涉及机械零件的内螺纹深度测量工具。