These webs are formed by mechanical means.

这种成网方式可以使用极短的纤维。

I must design a mechanical means of closing the portal.

我要尝试重新设计一种机械以关闭旋涡门。

Pulps obtained by grinding fibrous woods with mechanical means.

美国名词。用机械方法将木材纤维原料磨解成纸浆。

though there's no instruction book on a mechanical means to do this.

不过没有用机械方式做到这点的说明书。

Orientation of particles can be achieved through mechanical means.

刨花的定向可以用机械方法来完成。