The anchorage length of bolt can be controlled by adjusting the distance of anchor-boot and pressing ring.

通过调整压环与锚头之间的距离来确定锚杆的锚固长度。

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The manual pressing section makes the downward movement by a slide cylinder and a pressing head driven by a pressing rod, and the travel of the pressing head is controlled by a limited ring;

手动按压部分由按压杆带动滑柱及按压头向下运动，并通过限位环来控制按压头的行程；

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Listen! Somebody is pressing the door ring.

听！有人在按门铃。

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Most of these gizmos, like the hipKey and Proximo, work in reverse, too: Pressing a button on the sensor will make your smartphone ring even if the volume is turned down.

WSJ: Track Your Lost iPhone and Other Gear With These Gizmos