Hold tube bend in position, Fig. 5, and mark tube on level with top of hex on compression coupling. Cutoff tube at this mark.
将管子弯头握住在位置上，图5，在压紧联轴节上六角顶部标注管道水平位置。
2
Cutoff head lettuces at ground level.
如果是球生菜，就沿着地平面割下来。
3
Objective To determine the cut-off value of serum neuron-specific enolase (NSE) level for distinguishing small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC).