The observing relations between tests and faults are emphasized and described clearly with DIFM.

模型反映了试验及试验与故障之间的观察关系。

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Instantaneous frequency measurement (DIFM) receiver is one of important component part of EW system.

瞬时测频接收机是电子战系统的重要组成部分之一。

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The design of an X band broadband microwave correlator used in digital instantaneous frequency measurement (DIFM) is introduced in the paper.

本文介绍了应用于数字瞬时测频接收机(DIFM)中的X波段宽带微波相关器的设计。

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With parts and repair costs dropping and cars becoming more complicated, the ratio of DIY to DIFM (do-it-for-me) has been dropping as well.

FORBES: O' Reilly Revs Up The Auto DIY Space