求助关于“双阻断-泄放”的阀门设计的一段话的翻译？ in contrast, the osha federal regulation describes dbb as “the closure of a line,duct or pipe by closing and locking, or tagging , two in-line valves and by opening and locking, or tagging , a drain or vent valve in the line between the two closed valves.” 上面是osha（美国职业安全卫生管理局）对dbb（双阻断-泄放）的描述，我看不懂，谁来帮忙翻译下，谢谢！然后我根本看不懂红色部分的词汇，并且还想问一下第一个 tagging 与后面的two in-line......的成分之间有联系么？是在一起的么？这种前后关系搞不清的话真不好翻译。。 查看更多
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