Rantai 20A-1 / 20B-1 minangka jinis rantai roller, lan beda-beda utamane ing dimensi sing rada beda.Antarane wong-wong mau, jarak nominal chain 20A-1 yaiku 25,4 mm, diameter poros yaiku 7,95 mm, ambane njero 7,92 mm, lan jembar njaba 15,88 mm;sementara pitch nominal...
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