“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	radioactive thickness gage radioactive tracer radioactive transformation radioactive waste radioactive-waste disposal radioactive well logging radioactivity radioactivity analysis radioactivity concentration guide radioactivity equilibrium radioactivity log radioactivity prospecting radio aid to navigation radio altimeter radio altitude radio and wire integration radio antenna radio approach aids radioassay radio astronomy radio atmometer radio attenuation radio aurora radioautography radio autopilot coupler

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