When did the starting air compressor pass its last special survey?
启动空气压缩机上次是什么时候通过专门检验的。
The filter is a good special apparatus of air Compressor front stage. It will produce the best effect.
它是空气压缩机前级的专用理想设备，推广使用可获得良好的综合效益。
The special structure is analyzed for the vertical twin screw compressor.
研究了立式螺杆制冷压缩机的结构特点。
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