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碶塊(kuai)式(shi)單向(xiang)軸(zhou)承(cheng)是(shi)在一個方向(xiang)上可(ke)以自由轉(zhuan)動，而在另(ling)一個方向(xiang)上鎖死的一種(zhong)軸(zhou)承(cheng)。單向(xiang)軸(zhou)承(cheng)也叫超越離合器，只是(shi)根據行業(ye)不(bu)同(tong)，作(zuo)用不(bu)同(tong)來命名的。