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KTR72 POLYNORM弹性联轴器AR28 38 42 48 55 65 60 75 85 90GJL
KTR NBR 28 32 38 42 48 55 60 65 75 85 90联轴器弹性体POLYNORM
KTRNBR283238424855
联轴器缓冲垫POLYNBR德国进口