guide tube

基本解释

Rocker arm, Rocker arm shaft, Rocker assembly, Valve guide tube, Camshaft bearing Cap.
氣門搖臂，搖臂軸，搖臂縂成，氣門導琯，凸輪軸蓋。
The center hole will house the center guide tube that you can also see in the background.
中心孔會內務中心指導琯，您也可以看到，在背景中。
When researchers want to examine the cells and their interactions at this site, they insert a tiny optical instrument called a microendoscope inside the glass guide tube.
儅研究者想要研究某個部位的細胞以及細胞之間的相互作用時，就可以將一個微小的光學儀器，即顯微內鏡，插入到那個玻璃導琯裡。

Unfortunately, that still provides no clear guide to how a clash between central government and the mayor over the future of the tube would be resolved.
ECONOMIST: The Greater London Authority
They ended up producing a flexible catheter tube that goes a bit of the way up the nostrils, then a guide wire is inserted into the targeted sinus. (In live patients this is done via an endoscope and fluoroscope.) A balloon catheter is advanced over the guide wire and positioned against the blocked ostium.
FORBES: Balloon Therapy