ball point nib 球形笔尖
Ball point pen 圆珠笔头; 圆珠笔
ball point pen refill 圆珠笔芯
ball point print head 点打印头
ball-point 圆珠笔
ball-point pen 遗传平衡; 圆珠笔
ball-point penetrator 球体贯入度仪
cloisonné design ball point pen 景泰蓝圆珠笔
manufacture technology of erasable ball-point pen and its ink 可擦性圆珠笔及其油墨的制造技术
pen ball-point material 圆珠笔头材料
refill for ball-point pen 圆珠笔芯
Ball’s Point 鲍尔点
ball-control-point 球形控制点
double rows four point contact ball bearing 双排四点接触球轴承
Four Point Contact Ball Bearing 四点接触球轴承
four-point contact ball bearing 四点接触球轴承; 四点接触轴承
four-point contact ball beating 四点接触球轴承
ring and ball softening point 环球法软化点
thin walled four point contact ball bearing 薄壁四点接触球轴承