习惯用语studio couch1.可拉开成卧床的沙发couch together1.层叠特殊用法lower couch (roll)1.下伏辊suction couch (roll)1.真空伏辊suction couch with open chamber1.敞开式真空伏辊top couch (roll)1.上伏辊upper couch (roll)1.上伏辊vacuum couch1.真空伏辊