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1·The text has analyzed the mechanism of contraction crack on the surface of ceramic . fibre.

分析了纤维收缩产生裂纹的机理。

2·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。

3·This paper analyzes mechanism of crack development in cast-in-place concrete under combined action of concrete contraction and temperature difference.

分析现浇板因砼收缩和温差影响的组合作用裂缝的产生机理。

4·The formula of strain and crack width of temperature and contraction with no varying place constraint con detion are deduced, capale be design basis for crack control of R. C structure.

阐述了砼结构体表比和约束比对温度和收缩应变和裂缝的影响程度，推导出R．C结构在四周无变位边界约束条件下的温度和收缩应变、应力及裂缝宽度计算公式和运用实例。

5·Biological dimensions of wood fiber has good stability, there will be no contraction of mixtures settlement, and to increase their crack resistance.

木质纤维的生物尺寸稳定性好，混合料不会发生收缩沉降，并提高其抗裂性。

6·Product Introduction: Uses the special-purpose chemical additive, achieves the anti-crack goal through the chemical reaction controlling mortar contraction.

产品介绍：采用专用添加剂，通过化学反应控制砂浆收缩达到抗裂目的。

7·The casting fluidity, ratio of line contraction, casting stress and heat crack tendency were tested.

分析测定了中铬抗磨铸钢的流动性、缩孔率和铸造应力。