We use PNF stretching which is a combination of passive stretching and isometric contractions designed to increase flexibility more rapidly.
我们采用PNF拉伸，这是一种将被动伸展和等长收缩相结合的方法，旨在快速提高身体的灵活性。
This feature makes it possible to produce the filler by isometric transformation of thin sheet through local bending without material stretching.
采用薄板等积变换通过局部弯曲而不拉伸材料的方法制造该种芯材已成为可能。
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