“prop-crib timbering”的概念、定义、翻译、参考文献-科学参考

单词	prop-crib timbering
释义	prop-crib timbering [`präp ´krib `tim·bǝ·riŋ] ^{MINING ENGINEERING} Shaft timbering with cribs kept apart at the proper distance by means of props.
随便看	multiple root multiple-row blasting multiple sampling multiple scattering multiple sclerosis multiple series multiple serositis multiple shooting multiple-shot survey multiple-slide press multiple spot welding multiple-stage rocket multiple-stage separator multiple star multiple-strand conveyor multiple stratification multiple switchboard multiplet multiple target generator multiplet intensity rules multiple tropopause multiple-tubing string multiple-tuned antenna multiple twin quad multiple-unit semiconductor device

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