他们形成的沟槽使碎屑从孔道逃脱；

They form channels through which chips escape from the hole;

在型腔周围均衡的配置冷却孔道。

Layout cooling channels around cavities evenly.

然后，他将这捆东西塞进竖井地底的一个小金属孔道中。

Then, he stuffs the whole bundle into a small metal porthole in the base of the silo wall.

在沿纬纱的飞行方向上，布置一系列的孔道，孔道上开有打纬时的脱纬槽。

A series of orifices, with slots to permit the removal of the filling at beat - up, can be placed along the filling axis.

它从一个直径只有十几厘米的孔道中来，科莱特试着换了几个位置，都不能一眼望到外面的天空。

It is only from a dozen centimeters in diameter to the pores, Klaette try for a couple of places, cannot be a glancing out of the sky.