闭式高速精密压力机
straight side high speed precision press
超精密精馏
super precise distillation
大中型精密分析仪器
Larg and medium—sized precision analytical instrument
高速精密压力机
High speed precision press
high-speed precise press
high-speed precision press
精密分馏
precise fractionation
precision fractional distillation
精密分馏柱
precision distillation column
精密分马力电机
precision fractional horsepower motor
精密分频
exactitude frequency-division