CN209762545U - 一种用于天然气管道泄漏的封堵帽及封堵装置 - Google Patents
一种用于天然气管道泄漏的封堵帽及封堵装置 Download PDFInfo
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Inventor after: Cao Qingsong Inventor after: Li Ming Inventor after: Yin Huanhuan Inventor after: Wang Liang Inventor after: Li Jianbo Inventor after: Li Dongming Inventor before: Cao Qingsong Inventor before: Yin Huanhuan Inventor before: Wang Liang Inventor before: Li Jianbo Inventor before: Li Dongming Inventor before: Li Ming |