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孔径计 [kǒng jìng jì]
[仪] apertometer
- 粉末按重量计90%及以上可从网眼孔径为1毫米的筛子通过的产品。
Powders Products of which 90% or more by weight passes through a sieve having a mesh aperture of 1mm. - 按重量计不到90%可从网眼孔径为1毫米的筛子通过，而90%及以上可从网眼孔径为5毫米的筛子通过的产品。
Products of which less than 90% by weight passes through a sieve with a mesh aperture of lmm and of which 90% or more by weight passes through a sieve with a mesh aperture of 5mm.
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