网络释义
double helical gear pump 人字齿齿轮泵
double helical tooth 人字齿 ; 人字齿轮
double helical pinion 人字小齿轮
double helical spring 复式螺旋弹簧
double helical gear planer 人字齿轮刨床
double helical mixer 双螺浆混合器
double helical spur wheel 人字齿轮
double-helical gearbox 人字齿轮减速器
double helical bevel gear 人字齿伞齿轮
双语例句权威例句
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Gear drawing standards - part 1: for spur, helical, double helical and rack.
齿轮制图标准。第1部分：正齿。螺旋齿。双螺旋齿和齿条。
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DNA is composed of two polynucleotide chains associated so as to form a double helical molecule.
DNA是由两个相关联的聚核苷酸链组成的双螺旋分子…
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When carries various chemical modifications on double helical molecular of optically active, we can always gain derivatives which have specific properties.
在具有光学活性的螺旋分子母体上进行各种化学修饰，可以获得许多具有特殊性能的衍生物。
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