片语
bellows mechanical seal波纹管机械密封
metal bellows mechanical seal[机]
bellows s seal gland伸缩箱式封盖
Bellows-seal combination前轴封
bellows pressure seal波纹管压力密封
Meatl bellows mechanical seal金属波纹管机械密封件
bellows expansion seal伸缩膨胀密封
l bellows mechanical seal金属波纹管机械密封
bellows s seal波形密封