Ikibanza: 25.4mm, diameter ya roller: 15.88mm, izina risanzwe: ubugari bwimbere bwihuza muri santimetero 1: 17.02. Nta kibanza cya 26mm kiri muminyururu isanzwe, icyegereye ni 25.4mm (urunigi 80 cyangwa 16B, ahari 2040 urunigi rwikubye kabiri). Ariko, diameter yo hanze yizunguruka yiyi minyururu yombi ntabwo 5mm, ...
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