这种安全控制措施带来了PLM的概念市场。
This safety and control measure brought about the concept of PLM in to the market.
其安全体系具有多个层次，每个层次都有相对的安全控制措施。
Its security system has multiple levels; each level has a relative safety control measures.
其安全体系具有多个层次，每个层次都有相对的安全控制措施。
Its security system has multiple levels; each level has a relative safety control measures.
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