bellowvi.吼叫vt.大声喝道n.吼叫声；风箱，鼓风机，鼓风匣子bellows expansion joint波纹管膨胀接头bellows type air spring囊式空气弹簧bellows mechanical seal波纹管机械密封bellows pressure sensor膜盒式压力传感器bellows-type regulator波纹管式调节器bellows-type lens hood皮腔式镜夹(遮光)罩bellows-type manometer波纹管式压力计,皱纹管式压力计bellows expansion joints波纹补偿器bellows-type steam trap波纹管式阻汽排水器bellows adjustment device波纹管调长器