... double stage ammonia compressor 双级氨压缩机 double stage compressor 二级空气压缩机 double stage nitriding 两段氮化法 ...
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... 二元给水调节器 two elements feed water regulator 二级空气压缩机 two stage air compressor 两段压缩 two stage compression ...
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二级旋转式空气压缩机 two-stage rotary air compressor ; stage rotary air compressor
二级固定式空气压缩机 two-stage stationary air compressor
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