异径管接头

1.reducingsocket  

异径管接的英语翻译：

【机】 reducing socket

头的英语翻译：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-