名词形式是assembly，意思是：装配；集会，***，例如：

1.Putting the bookcase together should be a simple assembly job.组装书橱应该是个简单的装配活。

2.Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。

3.He was to address a public assembly on the issue.他要对公众集会发表演说谈论这个问题。