外壳表面应平整无划痕、缩水纹、毛刺及其它机械损伤。

Surface of the adaptor case should no scratch , . no shrinkage mark, flash and mechnical damage.

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目视检查，无外观异常，表面无明显划痕、毛刺及其它机械损伤，外露金属部分无锈，其它限度根据样品确认。

Visual inspection the case have no visual abnormality, no obvious Nick, burr and other mechanical damage, outer metal have no rust. Use limit sample to check for any failures.

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