Design and biomechanical study on newly - manufactured cortex self - tapping interlocking screw 新型双皮质自攻螺纹交锁螺钉的设计与生物力学研究
4.
Roofing and wall cladding . fasteners . determination of the bending characteristic resistance . conventional test method for bending of self - drilling and self - tapping fasteners longer or equal to 70 mm 屋面和墙壁覆面.紧固件.弯曲抗性的测定. 70mm及以上的自钻和自攻螺纹紧固件弯曲性的常规试验方法