注：第一和第二止回阀模块的阀座和弹簧是不可互换的。较重的弹簧和较小直径的阀座属于第一止回阀模块。
Note: the seats and springs of the first and second check modules are not interchangeable. The heavier spring and smaller diameter seat belong with the first check module.
尽管NIEM通过提供公共定义和技术而有助于互操作，但是两个使用不同niem子集的IEPD的XML文档是不可互换的。
Although NIEM helps interoperability by providing common definitions and techniques, XML documents from two IEPDs that use different subsets of NIEM are not interchangeable.
如果没有1969年的那次互换，像现在白宫和克里姆林宫正在讨论的那种，我的父母永远不可能结合。
Without a 1969 exchange like the one now being discussed between the White House and the Kremlin, my parents would never have married.
但是，由于现在完成进行体还带有进行体的持续性、暂时性和未完成性的含义，有时就不可以与现在完成体互换使用。比较。
T here are cases, however, where these two forms are not interchangeable in that the present perfective progressive has also the meanings of continuousness, temporariness and incompleteness .
灵活方便的布线功能；模块化线槽拼装方便，地插座与边盖板任意互换，不可切割地板；每块盖板上没有出线口，可随意出线。
Agile and convenient wiring function; Modular trough assembles convenient, with edge to socket, don't cut any interchangeable cover the floor; Each cover plate outlet, with optional goes.
指出了加权和LMS算法的不可互换性。
It is proved that the weighting and the LMS algorithm can not be interchanged.
指出了加权和LMS算法的不可互换性。
It is proved that the weighting and the LMS algorithm can not be interchanged.
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