基本解释[地球科学]真空取样器[机械工程]真空取样器英汉例句双语例句It is necessary to solve openning-tube sampling problem for the mass-spectrometer analysis of residual gases in sealed vacuum devices.密封真空器件内残气的质谱分析，必须解决开管取样技术问题。专业释义地球科学真空取样器机械工程真空取样器