如果从严正的语法上说,这个句子肯定缺少某些部分.这个句子从整体来看还是看的懂的,the attached is engineering drawing for customer needing changing,we have changed it and pls confirmed by customer.
the attached应该呗当作名词成分 附件,engineering drawing 工程图 customer need change.客户和需要存在的是主动关系所以应该是现在分词needing,need 后面加动词ing 表示被动,这里即需要被改变,后面就不解释了.坐观楼下看法