Most metal and plastic parts are designed to be manufactured, which means they can be clunky and contain material surplus to the part's function but necessary for making it.
大多数金属和塑料是为了生产而设计的，这就意味着它们会很重，并且含有与生产有关，但与其功能无关的剩余物。
The first batch of plastic parts finally came out, assembled with other metal test parts, doing the 1st time function test.
第一批的塑胶零件终于试出来了，与其他试做的零件组成第一支笔做功能测试。
应用推荐