Compared with the drill and blast method, TBM tunnelling has significant advantages with high construction efficiency, low project cost, conducive to environmental protection, favorable stability contr.
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[pdf] High efficiency oil-free compressor Air-end ● The first and second level materials are stainless steel； ● High rotary speed SKF bearing； ● Special coating，270℃ temperature resistance； ● Oil jacket cooling，No scaling or dew coagulation risk； ● High precision synchronous gear. Efficient suction system
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