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碶塊式單(dan)向軸(zhou)(zhou)承是(shi)在一個方向上(shang)可(ke)以自由轉(zhuan)動(dong)，而(er)在另一個方向上(shang)鎖死的一種軸(zhou)(zhou)承。單(dan)向軸(zhou)(zhou)承也叫超越(yue)離(li)合(he)器，只是(shi)根(gen)據行業不(bu)同，作用(yong)不(bu)同來命名的。