Objective To investigate the methods of holding needle in venipuncture.

目的探讨静脉穿刺的持针方法。

youdao

According to the invention, the needle has a cannelure (14), for holding a supporting element (19) with a form of strip (20).

根据本发明，该针具有套管（14），用于保持具有条带（20）形式的支撑元件（19）。

youdao

An acceptable thimble is metal and fits snugly on the middle finger of the needle - holding hand.

好的顶针是金属制成的，并能舒适地戴在拿针的手的中指上。

youdao

In Mr. Frampton's lab, technicians spent several hours this past week rubbing the branches and weighing needle loss from hundreds of Fraser fir samples, to weed out non-needle-holding family lines.

WSJ: Fir Real? Christmas Trees in Crisis as Americans Flock to Fakes