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.
圆形机身和锥形前部和尾部采用一个尖形前鼻和尾锥和一个腹鳍。
The fuselage is round and tapered front and rear with a pointed nose and tail cone and a belly fin.
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.
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