speed up the establishment of direct links of postal, air and shipping services and trade between the two sides
加速实现两岸直接通邮, 通航, 通商

Dint of Super Frequency High Pressure Double Clicks Jet Research on High Speed Blockbroke Technology for Power Plant Air Preheater
高压超频凿击射流对空热器快速破堵技术研究

Application of Wind Speed of Hot Air Feed Pulverized coal Boiler and Coal Concentration Measuring Technology in Thermal Power Plant
热风送粉锅炉的风速与煤粉浓度测量技术在火电厂的应用

The speed of sound increases slightly with a rise in temperature and falls with a decrease in temperature. It is not affected by the pressure of the air.
声速随温度的升降有些微小的增减，但不受气压的影响。