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碶塊式單向軸承是(shi)在一(yi)(yi)個方向上可(ke)以自由轉動(dong)，而在另(ling)一(yi)(yi)個方向上鎖死的(de)一(yi)(yi)種軸承。單向軸承也叫超(chao)越離合器，只是(shi)根(gen)據行(xing)業不同(tong)，作用不同(tong)來命名的(de)。