英语词汇roof periodic caving怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	roof periodic caving
释义	roof periodic caving 简明释义顶板周期垮落网络释义 1 [矿业]?顶板周期垮落顶板周期垮落短语 1 roof periodic caving law 顶板周期垮落规律双语例句 1 Based on field observations and theoretical analyses, the characteristic of periodic caving of immediate roof and main roof in a room and pillar system was analyzed. 通过理论分析和现场实测，对房柱式采煤的矿压显现规律及其特点进行了探讨。
随便看	dirt count dirt court dirt cover dirt dauber dirt dauber dirt deposit dirt discharge at discharge end dirt discharge at feed end dirt-disher dirt dispersion agent dirt eating dirt-eating dirt-encrusted dirter dirtest dirt excluder dirt-excluding groove dirt excluding groove dirt extraction dirt extraction gear dirt factor dirt farm dirt farmer dirt farmer dirt farming

英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。