求翻译：原因：接管S3原设计的尺寸以作修改（原管径DN250改为DN300），接管已按修改后的尺寸进行加工，而封头管孔仍按原尺寸开孔，产生尺寸不相配合是什么意思？

Reasons: to take over the size of the of s3 original design to be modified (the original diameter dn250 changed dn300) take over the processing has been modified size, while the head upon the original size of the pore openings, resulting in the size of incompatible

Reason 3: take over the original design of S size to modify (the original pipe diameter DN DN 250 to 300), has been taken over by the size, the head tube bore is still on its original size, the hole size does not fit a

Reason: Takes over control the S3 original design the size to make the revision (original caliber DN250 to change DN300), the control has carried on the processing after the revision size, but the shell cover cable channel still opened the hole according to the full size, had the size not to coordin

Reason: took over the original design of the S3 to amend (the original pipe DN250 to DN300), took over as the modified dimension processing, and head tube bore hole opening is still in its original size, dimensions do not match

正在翻译，请等待...