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1·For welding low-alloy and high strength steel with corresponding strength grade.

用于相同强度等级的低合金高强钢的焊接。

2·So the properties of plastic molding for lower strength grade lumber can be improved by reducing the strain rate.

硬化强度等级低的板材可以通过降低变形速率改善塑性成型性能。

3·Load Angle, eccentric distance, steel ratio, concrete strength grade and length-thickness ratio had been analyzed.

分析了加载角、偏心距、含钢率、混凝土强度等级以及肢长厚比对构件承载力的影响。

4·At the same time, the concrete has high compressive strength, good durability, strength grade of a wide range of characteristics.

同时混凝土还具有抗压强度高，耐久性好，强度等级范围宽等特点。

5·The deterioration is accelerated because the strength grade of concrete is too low, depth of cover too thin, and drain off water unsuitable.

调查表明，原设计混凝土标号过低，保护层过薄，桥面排水不当，加速了劣化过程。

6·Large volume waterproof concrete with C30 strength grade and seepage resistance P>25 can be mixed by adding expansion agent and reduce-water agent.

经试验表明，在砼中复合掺加膨胀剂和高效减水剂，可制得强度等级为C30，抗渗等级P＞25的大体积防水砼。

7·According to data collected in experiments, freeze-thaw effect on strength and deformation of four different strength grade concretes were analyzed.

通过对试验数据的整理，分析了冻融循环次数对四个强度等级混凝土的强度和变形的影响。

8·The whole stress-strain curves of structural lightweight aggregate concrete (LWAC) with strength grade from LC30 to LC55 were obtained experimentally.

测定了采用高强轻骨料配制的强度等级LC30～LC55的结构轻骨料混凝土（LWAC）的应力-应变全曲线。

9·In the test, the strength grade of concrete is C20 and C60, and the cementitious system contains 10%, 20%, 30% and 40% of fly ash in accord with weight.

实验中应用的混凝土的强度等级分别为C20和C60，其中粉煤灰的掺量(胶凝材料的质量分数)分别为未掺、10%、20%、30%、40%。

10·Some technical methods are used to make construction convenient when different strength grade concrete is used in the joint of beam and column in high building.

介绍了高层建筑中 ，在钢筋混凝土框架结构的梁柱节点处 ，混凝土强度等级不同 ，为了方便施工 ，所采取的技术措施。