题目：
关于油封（唇形密封圈）不正确的说法是（）。
A．内侧可置弹簧补偿唇边磨损
B．靠油压使唇边保持密封
C．不允许内侧油压过高
D．安装时与轴接触面应涂油或油脂
答案：
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关于油封（唇形密封圈）不正确的说法是（）。A．内侧可置弹簧补偿唇边磨损 B．靠油压使
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