2.98 kGy/h (1007 h) gamma irradiation and 90 ℃ (2000 h) thermal aging were exerted to X65 grade low carbon steel buried......

　　The objective of this study was to determine whether there was significant seasonal and zonal variation in the speci......

尽管有在中国喷雾器上增加注意，从来没有它的一般特征的遍及全国的调查。这份报纸在 23 个地点为喷雾器论述元素的数据在并且在中国......