总成;
A unit composed of an assemblage of pieces welded together.
自行车上的零部件得焊接在一起.
Taking Mesozoic volcanic rocks in Eastern Fujian as an example, the authors put forward a new cartographic unit of volcanic terrains ( volcanic cycle, volcano tectonic element and lithofacies assemblage), in which the volcano tectonic element is a basic cartographic unit.
以福建省东部中生代火山岩为例,提出以火山旋回-火山构造单元-岩相(组合)作为火山岩区的三级填图单位,其中火山构造单元为基本的填图单位。
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