环上取代反应 Nucleus Substitution ; nuclearsubstitution 双取代反应 double displacement 亲核取代反应 nucleophilic substitution ; nucleophilicsubstitutionreaction ; SN reaction ..
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double-displacement mechanism 双置换机制
double-acting positive displacement compressor 双作用容积式压缩机
Double Amplitude Displacement 全振幅位移
FIXED DISPLACEMENT DOUBLE VANE 双联定量叶片泵
double-channel tube displacement 双腔管置换术
VARIABLE DISPLACEMENT DOUBLE VANE PUMPS 双联可变容量叶片大泵浦
Double screw pump as a positive displacement pump, the pump suction chamber should be closely separated and discharge chamber inside.
双螺杆泵作为一种容积式泵，泵内吸入室应与排出室严密地隔开。
Based on characteristics of optical polarizing, Malus law, and Faraday optical rotation, a long-range displacement detector is realized by same light source and double light route.
基于光的偏振特性、马吕斯定理和法拉第旋光效应，采用同光源双光路检测，实现了大量程直线位移的测量。
This paper presented the working principle and structure of the double-action vane pump, analyzed its mechanism of variable displacement and characteristics of energy saving.
本文介绍了双作用叶片式二次元件的结构和工作原理，分析了其节能原理和特点。
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