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碶塊式單向軸承(cheng)是(shi)在一個(ge)方向上(shang)(shang)可以自由轉動，而在另一個(ge)方向上(shang)(shang)鎖死的(de)一種(zhong)軸承(cheng)。單向軸承(cheng)也叫超(chao)越(yue)離合器，只(zhi)是(shi)根(gen)據行業不(bu)同(tong)，作用不(bu)同(tong)來命(ming)名的(de)。