求助关于阀门技术规范里的一句话的翻译? 本人需要求助的句子: This specification shall apply to on plot valves (MESC and Non-MESC categories) under Hydrocarbon / sour / toxic / steam service. 这句话没有上文,因为它是全文第一句话,此节小标题为“用途”。下文倒是有一点点:This is in addition to the applicable International codes, MESC specification, SHELL SPE and technical requisition. The purpose of this specification is to upgrade the valve integrity in terms of reliability and safety. In general the specification is applicable for Ball, Gate, Globe, DBB valve and Triple Eccentric Butterfly valve. 上面那句话的大意我懂,就是说 “此份规范必须可适用于用在介质为烃类 / 酸类 / 有毒物质 / 蒸汽的工况条件下的阀门。”但是就是不知道这个 on plot 在这里是什么意思,感觉闻所未闻啊,不知道是不是打错了。本来前面就有个介词 to 了,怎么后面又来了个 on 呢。。。。真心不懂,求高人指点! 查看更多4个回答 . 3人已关注