“roof jack”的概念、定义、翻译、参考文献-科学参考

单词	roof jack
释义	roof jack [`rüf ´jak] ^{MINING ENGINEERING} A screw- or pump-type extension post used as a temporary roof support.
随便看	regional geology regional ileitis regional metamorphism regional metasomatism regional migration regional slope regional slope deposit regional snowline regional unconformity region of escape regioselective regiospecific register register breadth register capacity register circuit register control register glass register length register-level compatibility register mark register-sender register ton register tonnage register variable

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。