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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。
youdao
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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。
youdao
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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。
youdao