The clue is, a picture is worth a thousand words

本帖於 2019-09-13 06:09:03 時間, 由普通用戶 MoonRiverMe 編輯
回答: 2 x 0.748 < 1.535 is the cluebashfulx2019-09-13 04:50:54

How stupid can one be not to call a center hole inner diameter?

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