FFT is a very important algorithm in digital signal processing, and butterflyoperation modules are important construction modules in FFT processor.
FFT是数字信号处理中的一种非常重要的算法，蝶形运算模块是FFT处理其中的重要构造模块。
2
Stem extensions can BE furnished to permit remote operation of butterfly valves in any required length.
配备所需长度的阀杆延长件，可以对某个蝶阀进行远程操作。
3
Structure Designed is similar to hard sealing of three - eccentric of butterfly valve, with convenient operation, without friction opened and leakage, long life.