downhole safety的意思|示意
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井下安全
downhole safety的网络常见释义
井下安全 ... 井身结构wellbore configuration 井下安全downhole safety 井下复杂情况down hole problem ...
downhole safety相关短语
1、 downhole safety valve 井下安全阀
2、 Safety rules of downhole services 井下作业安全规程