| 单词 | bell-tubing | 
| 释义 | > as lemmasbell-tubing   bell-tubing  n. tubing through which a bell-wire is passed in order to protect it. ΘΚΠ society > occupation and work > materials > derived or manufactured material > metal > metal in specific state or form > 			[noun]		 > wire > tubing for wire bell-tubing1881 1881    Mechanic §1540. 692  				It is usual..to provide for the passage of the bell wires from floor to floor by inserting bell-tubing in the walls. < as lemmas | 
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