“jack timber”的概念、定义、翻译、参考文献-科学参考

单词	jack timber
释义	jack timber [`jak ´tim·bǝr] ^{MINING ENGINEERING} A timber such as a rafter that is shorter than others with which it is used.
随便看	hypokalemia hypokinesia hypokinetic syndrome hypolimnion hypomagma hypomenorrhea hypomere hypometabolism hypomorph hypomorphic allele hypomotility hyponasty hyponatremia hyponeural sinus hyponychium hypoovarianism hypoparathyroidism hypophalangism hypopharynx hypophosphatasia hypophrenia hypophyseal cachexia hypophyseal duct tumor hypophysectomy hypophysis

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