还有另外一种技术能利用波形的一些特征，在大多数情况下它的效果非常好，能识别第二个收缩性平台。

There is another technique that USES a feature of the wave form which is quite good in most cases that identifies the second systolic shoulder.

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与现有技术相比，具有生产能力高，生产过程无断丝、 收缩、扭转等现象，生产的粉芯丝材成型效果好，表面光滑等优点。

Compared with the prior art, the mechanical device has no phenomena of wire breaking, contraction, torsion, and the like and has the advantages of high production ability, good molding effect, etc.

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