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碶塊式單向(xiang)軸承(cheng)是在(zai)一(yi)個方向(xiang)上(shang)可以(yi)自(zi)由轉動(dong)，而在(zai)另一(yi)個方向(xiang)上(shang)鎖(suo)死的一(yi)種軸承(cheng)。單向(xiang)軸承(cheng)也叫超越(yue)離合器(qi)，只(zhi)是根據行(xing)業不同(tong)，作用不同(tong)來命名的。