variable velocity zone 变速带
zone of variable wind 不定风带
variable composi-tion zone 变异成分层
zone of variable phreatic level 潜水位变化带
temperate zone , temperature zone
The influence of variable zone lengths, zone passes, moving speed and the impurity of raw materials on the purification process was studied.
考察了熔区移动速度、区熔次数、熔区长度以及黄磷原料杂质初始含量对提纯效果的影响。
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