作为FI -扩张模和广义扩张模的真推广，引入了(强)FI -广义扩张模的概念并讨论了这些模的基本性质。
As proper generalizations of FI-extending modules and generalized extending modules, concepts of (strongly) FI-generalized extending modules are introduced, and some basic properties are discussed.
从理论上证明了高阶模波（如家快捷）的存在，在扩张消声器。
The existence of higher order mode waves (HOMW) in expansion mufflers is proved theoretically.
脚部形成在边缘扩张部的边缘部上，在离开凹部的位置上，无论凹部形状如何， 都能够与壳体的起模方向一致地成型。
The foot part is formed on the edge of the edge extension part on the same pattern-drawing direction of the shell at the position off from the cove whatever the shape of the cove is.
脚部形成在边缘扩张部的边缘部上，在离开凹部的位置上，无论凹部形状如何， 都能够与壳体的起模方向一致地成型。
The foot part is formed on the edge of the edge extension part on the same pattern-drawing direction of the shell at the position off from the cove whatever the shape of the cove is.
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