它还配有一只翻开式座架、一只弹簧固定件，用来夹持在笔记本/书写板上，此外还有一只孔眼，以便用挂绳来悬挂到墙上。

Also has a flip-open stand, a spring fastener for clipping to a notebook/clipboard, and an opening for a lanyard or hanging on a wall.

youdao

我们公司专业生产挖掘机链轨、链条及支重轮、托链轮、引导轮、驱动齿、履带板螺栓、链销、链通、斗轴、斗轴套、千秋架、弹簧座等系列产品。

Our main products include chain track, track roller, carrier wheel, guiding wheel, driving wheel, track shoe screw, shaft sleeve, pin, bushing, and link rod, recoil spring etc.

youdao