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End天下就你一个聪明人么？明日再议。Category: The attribute is used to specify the environment in which the current Action is executed;Proxy is an object, which can be used to control access to ontology objects. It implements the same interface as ontology objects. Proxy objects will pass all calling methods to ontology objects. The most basic form of the proxy mode is to control access, while the ontology object is responsible for executing the function or class of the assigned object. Simply speaking, the local object focuses on executing the code on the page, while the proxy controls when the local object is instantiated and used. We have used some proxy patterns in the above monomer patterns, that is, using proxy patterns to instantiate the monomer patterns, and leaving other things to ontology objects.The warpage of printed boards with patch components shall be ≤ 0. 7%.