单词	bottleneck machine
释义	bottleneck machine 瓶颈机床
随便看	social stratum division research social stratum harmony social stratum of consumer social stratum relations social stratum structure social stress social-structural social-structural discrimination social-structural empowerment social structural tension Social Structural Transition social structure social-structure social st ruct ure social structureal social structure change social structure evolution social structure of china social structure of dual economy social structure polarization social supervision social supervision system social supervisor mode social supply social suppor