witnessed versus unwitnessed certification testing
... 系列概念与型式认证 Family concept versus type approval 目击与非目击认证测试 Witnessed versus unwitnessed certification testing 退化因素 Deterioration factor ...
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witnessed versus unwitnessed certification testing
见证与非见证认证测试
以上为机器翻译结果，长、整句建议使用 人工翻译 。