“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	fluing fluke flume flumed fluoborate fluoborite fluocerite fluolite fluometuron fluophor fluor fluoranthene fluorapatite fluorene fluorescein fluorescence fluorescence analysis fluorescence digital imaging microscope fluorescence method fluorescence microscope fluorescence spectra fluorescence x-rays fluorescence yield fluorescent antibody fluorescent antibody test

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