请输入您要查询的英文单词:
单词
rock bolt
释义
WordReference Random House Unabridged Dictionary of American English © 2024
rock
′
bolt′,
[
Mining, Civ. Engin.
]
Mining, Civil Engineering
a steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber.
1955–60
随便看
happed
happen
happenchance
happening
happen on
happen-so
happenstance
happi coat
happily
happiness
happing
happy
happy camper
happy dust
happy event
happy-go-lucky
happy hour
happy hunting ground
happy medium
happy valley-goose bay
happy warrior
hapsburg
hapten
hapteron
haptic
英语词典包含188688条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。
Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2026/1/27 1:45:17