oil seal

• 油封,油封圈

oil seal的用法和样例：

例句

1. Inspect the seal for damage or cracks.
   检查油封是否损坏或开裂。
2. Oil may be forced out through the timing cover and rear-main bearing oil seals.
   机油会从正时齿轮盖和后主轴承油封处压出。