| 摘要 |
The present invention provides: a lining material comprising a flexible fabric tube which is a circularly knitted fabric comprising a ground and a plurality of tufts of fabric projecting from the ground on the inside thereof, and a flexible sleeve within the tube, the flexible sleeve being substantially impervious to at least one of a gas and a liquid and being capable of being inflated in use to generally radially outwardly bear on the tube to force the tube in use into general conformity with an orifice.
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