橡皮塞 meaning in English

rubber bung
rubber plug
rubber stopper
soft rubber ball

Specification for rubber stoppers and tubing for general laboratory use
普通实验室用橡皮塞和橡皮管规范
Remove the plastic cover from the needle on the syringe
把针头上的塑料盖取开，对准干扰素管子的橡皮塞中间，插入针头。
Metalline phase diagram experimental stove , microcomputer controller , accessories ( from front to back : platinic resistance , rubber stopple and stainless steel thimble inserted into the glass tube , white carborundum tube
从前向后为铂电阻、橡皮塞与不锈钢套管插在玻璃管中、白色碳化硅管)