It is concluded through analysis that the combustion chamber contraction cavity of the thick-top piston is mainly caused by the defect of the mould and the inefficiency of the water-cooling system.

The reason resulting in contraction cavity in top of 195T piston combustion chamber in practice was analyzed, and the countermeasures of eliminating the contraction cavity were taken.

研究了在生产195T活塞毛坯时所遇到的燃烧室顶部缩孔问题，对其产生原因进行了分析，并提出了消除缩孔所采取的措施。

Taking 195T piston mould as an example, this paper studies the problem of contraction cavity encountered during the production of thick-top pistons.

以195t活塞模具为例，研究了在生产厚大顶部活塞毛坯时所遇到的缩孔问题。

The result shows that with the increase of the inner contraction ratio, the starting Mach number of inflow is increases.

研究表明，当进气道收缩比增大时，进气道的进口起动马赫数增大；

Study on back pressure and self-starting characteristics for sidewall-compression inlet with variable internal contraction ratio by moving cowl

移动唇口变收缩比侧压式进气道反压特性和自起动性能

The area contraction ratio has obvious influence on the flow pattern, discharge, wall pressure and air pressure inside level rotary flow.

研究发现面积收缩率对流态、泄流量、壁面压强和空腔内的气体压强均有较大的影响。

The simulation results showed that with ideal conditions, nozzle contraction ratio increased, so as the flow velocity.

仿真结果表明在理想状态下，管口收缩比越大，水流速度增幅越大。

Numerical Study on the Influence of Nose Contraction Ratio on the Flow Field in Furnaces

折焰角收缩率对炉内三维流场影响的数值研究

Based on analyzing the loading stress and the temperature stress ( including contraction stress and warping stress), a calculating method of the slab size is set up.

道面板的尺寸是由飞机荷载和温度（包括伸缩应力和翘曲应力）共同作用所决定的。

On this base, the formula used for calculating the side pressure of ring wall, ring tensile and temperature contraction stress is established for engineering design.

在上述基础上提出的环墙侧压力、环拉力和温度收缩应力的计算公式，可供工程设计中采用。

Coating and the substrate surface temperature of the coating would have a bad contraction stress, caused by cracking and peeling off the coating.

涂层与基体表面的温度差会使涂层产生收缩应力，引起涂层开裂和剥落。

This paper analyzes the temperature field, the contraction stress, and the thermal stress in concrete arch culverts using Finite Element Method.

采用三维有限元模型，对混凝土拱涵进行温度场、收缩应力和温度应力分析。

How to calculate the contraction stress of semi-rigid pavement is the precondition to solve the problem.

而如何正确计算半刚性基层的收缩应力，则是解决这一问题的前提。

Analysis of Contraction Stress and Thermal Stress in Arch Culverts

拱涵收缩应力和温度应力分析

Evaluation of contraction stress due to temperature variation in buildings of mixed structures

混合结构建筑温度收缩应力的近似计算

Sensitivity coefficient obtained from calculation can represent how much the internal temperature variation and contraction affects the early crack of concrete structure.

计算得到的敏感系数能够表示结构内部温度变化和收缩这两个因素对于混凝土结构早期开裂的影响程度。

This paper introduces the features of the concrete, analyzes the types of concrete cracks, and sums up the causes of and control measures for the concrete cracks from the aspects of contraction crack, temperature crack and hydration heat crack.

介绍了混凝土的特性，分析了混凝土裂缝的种类，分别从收缩裂缝、温度裂缝、水化热裂缝等方面总结了混凝土裂缝产生的原因及其控制措施。

The sorts and cause of cracks are analyzed from the aspect of contraction crack, temperature cracking and differential settlement cracking and the control measures are put forward on engineering design, materials, construction and maintenance etc.

阐述了混凝土裂缝的种类，从收缩裂缝、温度裂缝、不均匀沉降裂缝等方面论述了裂缝产生的原因，并从工程设计、材料、施工、养护等方面提出了裂缝控制的措施与方法。

The article analyzes the feature of temperature contraction crack in super-long concrete structure and raises some design suggestion and measures to control and resist pressure of temperature contraction.

根据设计实践和体会，注重结构概念设计，简要分析了温度收缩裂缝的基本特点，重点分析了超长混凝土结构温度收缩裂纹及控制和抵抗温度收缩应力的具体设计建议与措施。

A concrete contraction crack and preventive measures

水泥混凝土的收缩裂缝及防止措施

A Brief Talk On Forepart Contraction Crack In Cement Concrete Road Surface

浅谈水泥混凝土路面早期收缩裂缝