顶部带 meaning in English

apical zone

Aerospace series - screws , pan head , slotted , threaded to head , in brass , tin plated - classification : 380 mpa at ambient temperature 80 c ; german version en 2651 : 1996
航空航天系列.镀锡黄铜制螺纹接近顶部带槽平头螺丝
Aerospace series - screws , 100 countersunk normal head , slotted , threaded to head , in brass , tin plated - classification : 380 mpa at ambient temperature 80 c ; german version en 2654 : 1996
航空航天系列.镀锡黄铜螺纹接近顶部带槽100度沉头螺
Aerospace series - screws , pan head , slotted , threaded to head , in corrosion resisting steel , passivated - classification : 600 mpa at ambient temperature 425 c ; german version en 2650 : 1996
航空航天.钝化耐蚀钢螺纹长度接近顶部带槽平头螺丝
Aerospace series - screws , 100 countersunk normal head , slotted , threaded to head , in alloy steel , cadmium plated - classification : 900 mpa at ambient temperature 235 c ; german version en 2652 : 1997
航空航天系列.镀镉合金制螺纹接近顶部带槽的100度沉
Aerospace series - screws , 100 countersunk normal head , slotted , threaded to head , in corrosion resisting steel , passivated - classification : 600 mpa at ambient temperature 425 c ; german version en 2653 : 1996
航空航天系列.钝化耐蚀钢螺纹长度接近顶部带槽100度