词汇	主、副螺纹
释义	主、副螺纹 main/subsidiary threads
随便看	Laboratory research Laboratory Research Cooperative Program laboratory resources laboratory restructuring laboratory result laboratory result mutual accredit laboratory results laboratory RETORT laboratory RETORTS Laboratory Review Office laboratory road wheel laboratory robotic system laboratory rocket Laboratory Rocket Evaluator laboratory roller mill laboratory room laboratory rotor mill laboratory rubber mill laboratory run laboratory safety laboratory safety and environmental protection laboratory safety education Laboratory Safety management Laboratory Salinometer laboratory sample