Objective To study the reaction between tinnitus volume and the ascendingspeed of auditory threshold in chronic nervous tinnitus patients.
目的了解神经性渐进性耳鸣、耳聋患者的耳鸣响度与听阈提高速度的关系。
2
The safety valve can make the lifting fluid-pressure drive circuit of a fork lift truck or a crane obtain not only high efficiency ascendingspeed, but also reliable and safe descending speed.
该安全阀使叉车或起重机的起升液压驱动回路既有高效率的上升速度，又有可靠的安全下降速度。
3
In the present system of fire controlling and alarming, it is essential to take the exact measurement and effective control of the actual temperature and its ascendingspeed in the detecting area.