Composite services can serve as a partitioning mechanism for overall solution.
复合服务可以看作是整体方案的一种配分机制。
A composite phosphatizing solution is developed according to the mechanism of phosphatizing film forming and the best prescription of phosphatizing solution is designed.
依据磷化的成膜机理，设计了复合磷化液的配方，并确定出磷化液的最佳配方。
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