The preferred embodiment includes a short twist to end portion 1805 (not shown for clarity) which may be one or more twists in length. In general for many applications it is desirable to have leader 1805 be less than three twists, and most preferably a single twist or a portion of a complete twist.
背景是形状记忆材料构成的丝所形成线。我写的在长度上的扭回数可为一或更大。是否正确 |
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