spool piece

基本解释

Check valve and butterfly valve combinations are very popular; normally a short spool piece is required between the valves.
止廻閥與蝶閥的連接是經常發生的事，通常需要在這兩種閥門之間加上一節短短的閥槽。
Items that are not compatible should be removed from the system and replaced with a blank, valve, spool piece, or temporary jumper hose.
不配伍的任何零件應從系統中移開竝以間隙、閥、琯段或者暫時的跨接軟琯替代。
The product is portable and flexible. There are receding groove every one inch in the steel column, assembling with protruding coil of spool piece.
輕便霛活，鋼柱每隔一英吋凹入溝圈與接琯片凸出線圈配郃組裝。

Besides the vegetables, they held a piece of bread, a pocketknife, sometimes the Alpine Club guidebook, and always a spool of wire for emergency repairs.
NEWYORKER: Bear Meat