一般喷丝头细孔的数量决定了纱中长丝的根数。
Usually the number of holes in the spinneret determines the number of filament in the yarn.
介绍了以无缝纯铜管为镶嵌体，用镶嵌法在铸铜件上铸造细孔的方法。
A casting technique for fine holes in Cu alloy casting by pure Cu tubes as insert bodies is introduced.
而这些效益都来自于生物炭满是微小细孔的结构，这些细孔对有益的细菌与真菌能够起到庇护作用。
These effects are the result of biochar's structure, which is full of microscopic pores that can harbour useful bacteria and fungi.
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