同时，雨水中还夹杂一些肉眼看不到的灰尘，经过阳光照射后，会衍生出大量的氧化物，时间长了想清理干净非常不易。
At the same time, the rain is also mixed with some of the naked eye can not see the dust, after the sun, will be derived from a large number of oxides, time to clean up very difficult to clean.
系统地分析了钢中氧的行为和降低钢中氧化物夹杂的措施。
Oxygen action in steel and measures reducing oxide inclusions in which are systematically analyzed.
结果表明：管坯裂纹是因热轧宽钢带基材中存在大量聚集分布的稀土硫氧化物和氧化铝夹杂所致。
The results show that these cracks are caused by the inclusions of rare earth sulphur oxides and alumina distributing in mass in base steel for hot rolled wide strips.
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