目前应用的镁合金中铸造镁合金占主要部分。
In all magnesium alloys cast Mg alloys were widely used by now.
切换时延由移动检测时延和注册时延组成，而移动检测时延在其中占主要部分。
The handoff laten-cy is composed by movement latency and register latency, and the The handoff latency is the main section of it.
数字地形图要素属性配置是数字地形图数据到GIS数据的一项重要而又繁重的工作，其中房屋属性匹配占主要部分。
The constituent attribute configuration of DIG is an important and hard work in converting DIG data to GIS data, with the house attribute configuration being the principal part.
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