词汇	plug for seal
释义	plug for seal 堵塞密封
随便看	double focusing double focusing analyzer double focusing at all masses doublefocusing mass spectrograph double focusing massspectrograph double-focusing massspectrograph double focusing mass spectrograph double-focusing mass spectrograph double-focusing mass-spectrograph doublefocusing mass spectrometer double focusing massspectrometer double focusing mass spectrometer double-focusing mass spectrometer doublefocusing mass spectrometre double focusing mass spectrometre double-focusing mass spectroscope double focusing spectrometer double-focusing spectrometer double focus interference microscope double-focus interferometer double focus method double focus points double focussing double focus system double focus tube