Microstructural characterization is usually achieved by allowing some form of probe to interact with a carefully prepared specimen. The most commonly used probes are visible light, X-ray radiation, a high-energy electron beam, or a sharp, flexible needle. These four types of probe form the basis for optical microscopy, X-ray diffraction, electron microscopy, and scanning probe microscopy.
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Based on the analysis of needle forces and deflection,flexible needle insertion into soft tissue is modeled with virtual spring.
在分析柔性针受力和挠曲的基础上,建立二维空间上柔性针穿刺软组织的虚拟弹簧模型,得到针体和针尖轨迹的数学模型。
参考来源 - 基于虚拟弹簧模型的柔性针穿刺仿真研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The disposable iv infusion set needle consist of protective cover, needle tube, needle handle, flexible tube, needle seat.
一次性使用静脉输液针由保护套、针管、针柄、软管、针座组成。
The part of hanging wire use flexible steel needle structure to ensure the very thin wire is connected when it is running at high speed.
挂线部分采用柔性钩针结构，保证超细线在高速绞线时不断。
When in use, as the flexible sealing body in the sealing piece exerts the key function, the sealing structure can still keep sealed when the sealing piece is repeatedly punctured by a syringe needle.
使用时，当针头多次穿刺密封件时，本实用新型仍能保持密封，这是因为密封件中柔性密封体起到关键作用。
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