extender
/ɪkˈstendə(r)/noun
1- a person or thing that extends something延长某事物的人; 延长器。
1.1
- a substance added to a product such as paint, ink, or glue, to dilute its colour or increase its bulk补充剂; 填料; 油漆调和料; 增量剂。
1.2
- Photography another term for EXTENSION TUBE.【摄】同EXTENSION TUBE.