Provide pin to avoid sealing at midway and protect seal part of packer, enhanced reliability of plugging string.

设计有防中途坐封的销钉，保护封隔器的密封件，提高了封堵管柱的可靠性。

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Provide pin to avoid sealing at midway and protect seal part of packer, enhanced reliability of plugging string.

设计有防中途坐封的销钉，保护封隔器的密封件，提高了封堵管柱的可靠性。

youdao