空调系统外文翻译-空调系统英文文献及翻译
Air Conditioning Systems Air conditioning has rapidly grown over the past 50 years, from a luxury to a standard system included in most residential and commercial buildings. In 1970, 36% of residences in the U.S. were either fully air conditioned or utilized a room air conditioner for cooling (Blue, et al., 1979). By 1997, this number had more than doubled to 77%, and that year also marked the
1、水流指示器，2、自动排气阀，3、球阀，4、蝶阀，5、电磁阀，6、旁通阀，7、水表井。 其余参考GB-T_50106-2001《给水排水制图标准》。
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