air and vacuum dual brake equipment  空气真空两用制动装置

swift response and air-and ground first-aid  快速反应、立体救护

non-perturbative QCD vacuum and vacuum condensate  非微扰QCD真空和真空凝聚

Valve and Valve Seat  气门与气门座

21-4N air valve steel  21-4N气阀钢

6M50 combination compressor of air and syngas  6M50空气-氢氮气联合压缩机

additional air valve  补给空气阀

ahead selecting pilot air valve  正车选择用控制空气阀

air (and) coal mixture  气—粉混合物

air air heat exchanger  气-气热交换器

air and aerospace information  空天信息

air and coal-powder monitoring  风粉监测

air and current devider  分风分流装置

air and exhaust gas  空气与废气

Air and feed water preheating unit  空气及给水预热装置

air and filling pipe  通气注入两用管; 通气注入管

air and filling pipe head  管头金属件

AIR AND FLUE GAS  风烟

air and flue gas duct  烟风道