The design principle of blackbody swallowtail cavity is discussed, its blackbody simulating mathematic equations and the geometric parameters of cavity are given.
讨论黑体燕尾腔的设计原理，写出它的黑体模拟数学式，给出适用腔体的几何参数。
2
For the first 3-6 months, you really shouldn't worry about turning or doing maneuvers, so whether your board is a swallowtail or a pintail or even if it only has one fin is really pointless.
Here you can see the rounded saddle-back style houses typical of regional working and farming classes and, in the background, the pointed, swallowtail roofs that were once the reserve of the gentry.