roofbolt

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. A safety bolt installed in the roof of an underground mine.
动词 v.
  1. To install safety bolts in the roof of an underground mine.

词形变化

roofbolts plural roofbolts present,singular,third-person roofbolting participle,present roofbolted participle,past roofbolted past

词源

词源 1
From roof + bolt.
词源 2
From roof + bolt.
0 次浏览 数据来源: Wiktionary