Never mind: my understanding

来源: biglow 于 2011-01-14 14:09:51 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

气门阀: valve

气门杆: valve stem

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.