rotating duplex compressor 双联式旋转压气机

duplex cylinder compressor 双缸压缩机

duplex reciprocating compressor 双列往复压缩机

duplex tandem compressor [机] 双并双串压气机

duplex type compressor 复式压缩机

duplex vertical reciprocating compressor 双缸立式往复压缩机

duplex x compressor 双动压气机

duplex tandem steam-driven reciprocating compressor 双列串联蒸汽驱动式往复压缩机