我怎麽覺得是因為放火花塞的那根空心鐵管可能有兩種尺寸，粗的和細的，所以橡膠密封也準備了兩種？

來源: 飯得誌於 2015-10-24 04:22:40 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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