A new stress element near a hole which satisfies both the stress boundary conditions at the hole and at the surface of the laminate and stress continuity condition at the interface is developed.

构造了一个满足孔边应力边界条件、层间应力连续条件以及层合板表面应力边界条件的孔边应力单元。

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That main panel needed to look dimensional, so the laminate surface sheet was mounted to a pan-formed sign, made from a sheet of 4x 10white. 040 aluminum pre-painted sheet.

如果要使主面板看起来有立体感，就要把成形的字母安装在层压板表面，该层压板是由4英尺x 10英尺的白色。040铝质薄板做成的。

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The plating copper is a key process in the production of PCB, which involves the quality assurance of metallization of PTH holes and laminate surface, and is affected by a number of factors.

电镀铜是PCB加工过程中的一个关键工艺流程，涉及到孔和板面金属化的性能保证，影响因素众多。

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