In conventional vapour-compression systems used by aircon units, the refrigerant is compressed and condensed and then expanded and evaporated to cool the room.
空调设备使用的传统的蒸发压缩循环系统中，冷却剂被压缩冷凝后膨胀气化来给房间制冷。
Deformation twinning of cast magnesium alloy AM60 was investigated by compression at room temperature with various deformation degrees from 3.
在电子万能试验机上对铸态am 60镁合金进行室温压缩试验，研究了在变形量分别为3。
The molding effects of biomass molding machine with variable diameters at room temperature were analyzed and the compression ratio range at high quality molding was determined.
并使用小刨花、锯末等材料进行验证，探讨了对生物质常温变径成型机成型效果的影响因素，同时确定了较高成型质量时成型腔的压缩比范围。
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