The hand knob and the shell employ a screwed joint, which can reach the self-holdrequest of the device.
手柄与外壳采用螺纹连接，可以满足机构的自锁要求。
2
Imagine if you called up a business colleague on the phone, and you were put on hold for a few hours while the colleague prepared a response for your request.
想象您在与一个同事打电话，而必须在电话机上等几个小时，直到同事给您的请求准备好响应这种情景。
3
There is a memory overhead to hold the spot, and in the case of an application server, memory for the thread that's handling the request.