套管

电缆管——为电缆过路、过桥专用保护套管，具有良好的耐酸碱和电气绝缘性能，电磁屏蔽性能。

outer casing

casing ring

sausage casing

ignition distributor casing, air-tight

casing of switch with a handle serving a purpose other than the actuation, lever switch

bell-weevil hanger【油气】;casing hanger【油气】

gear casing

casing O-ring