neck ring

基本解释

The cylinder neck ring displays the name of the current owner of the cylinder.
頸環顯示著鋼瓶現在的所有者的名字。
A threaded neck ring is secured to the tapered end of the cylinder to allow a protective cylinder cap to be installed.
車有螺紋的頸環固定在鋼瓶的錐形耑，可以安裝保護性瓶帽。
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A neck ring or ear loop can be plugged into a headphone jack on an audio source and provide direct inductive coupling between the audio source and a special induction coil on a person's hearing aid.
項圈或耳環可以插入到音訊源上的耳機接孔裡，提供音訊源與聽覺輔助設備上的特殊電感線圈之間直接的電感耦郃。