CONTENT Definition Etiology and clinical appearance Accompanied symptoms Approach to the patient

Concept A protective reflex that can be controlledconsciously Remove excessive secretion & foreignmaterial from the airway Initiated by miscellaneous stimuli or byvoluntary exertion. The most common respiratory symptom

1、辅助设备有哪些？ 1.1氟利昂螺杆冷水机组组成 1.2 制冷系统及其辅助设备

1、节流降压 2、控制冷媒流量,使蒸发器保持一定液体量 3、等焓过程

一、压缩机的类型 二、活塞式压缩机的工作过程及热力计算

1制冷的种类 -水(℃以上) -水(Brine,0℃以下) ·氯化的液

一、理想循环—逆卡诺循环 冷凝器 蒸发器

Summer Conditions Heat flow Indoor air temperature Summer Conditions Heat flow Indoor air temperature Remove heat from indoor air Finned-Tube Heat Exchanger

What are thermoelectric devices used for? Thermoelectric the military for night vision equipment, electronic Refrlgeration quipment cooling, portable refrigerators

一、微观经济学研究的主题 二、什么是市场? 三、经济学的演变 四、规范分析与实证分析 五、名义价格与实际价格