Flat File (2nd)是什么意思

网络释义

1)Flat File (2nd),中平扁锉2)flat file,平(板，扁)锉3)Flat File (1st),粗平扁锉4)Flat File (3rd),幼平扁锉5)middle flat file,中扁锉6)bastard equaling file,粗齿扁平头锉