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压缩机进行压力试漏时,在没有氮气的情况下,可用氧气进行试漏。

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What workplace diversity initiatives discussed in the cheaper might be appropriate for Deutschmark Telekom?What would be invoke/ved in implementing these initiatives?

R22是较常用的中温制冷剂,属HCFC类物质。

请区分社会义务、社会响应和社会责任。

What do you pink of his“quota”" approach that Deutsche Telekom is pursuing? Mhar benefits and drawbacks does such an approach have?

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