定义 中文名称： 前锥[面] 英文名称： front cone 定义： 在锥齿轮上，通常作为轮齿小端端面的一个假想圆锥面，其母线与节锥母线垂直相交。 应用学科： 机械工程（一级学科）； 传动（二级学科）； 齿轮传动（
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用线性化质粒 DNA 电穿孔前环锥虫体，筛选其对磷霉素的抗性。
Procyclic trypanosomes were electroporated with linearised plasmid DNA and selected for resistance to phleomycin.
型井架主体结构为前开口形轻便井架，整体分为四段，有锥销连接，具有拆除方便、整体稳定性强的特点。
The major structure of K-type Mast is open-face mast, and the body is divided into four sections, which are connected by tapers and convenient to be dismantled with good stability.
测得不同液压差下离心喷嘴锥形液膜的各项特性参数，如液膜半锥角、液膜破碎前长度等。
Also, the characteristic parameters of conical liquid sheet with centrifugal nozzle, such as half-cone Angle and breakup length, were measured under different liquid pressures.
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