The first level is represented by the MPS and is' exploded 'down to final assembly.
第一级就是MPS,展开到总装。
The total bill of materials on a $600 iPhone — the supplies that go into final assembly — is $187.51, according to iSuppli.
iSuppli更提供数据指出一部售价为600美元的iPhone,在进行总装前所花费的总材料清单仅为187.51美元。
For simple assemblies, the number of boards with these problems is small, so many companies pass the boards on to final assembly without a functional test.
对于简单的装配而言,电路板虽然存在这样的问题,但是数量少,所以很多公司在最后的装配过程中没有对电路板进行功能测试。
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