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是这个纱布吗？
6 a# f* v, n( c9 f; P) y# |+ ?
: t% ]5 \7 s$ r4 n: r# J41.1.28 Wherever cheesecloth is mentioned in connection with either a temperature test or an abnormal
3 U' |" o5 x8 C5 g, i. K/ r' B: ctest, the cloth is to be bleached cheese-cloth, running 14 – 15 yd2/lb (approximately 28 – 30 m2/kg), and
* G* g* O1 O) b8 Yhaving what is known to the trade as a ²count of 32 ´ 28² – that is, for any inch square, 32 threads in one& I( x) W8 _$ X- X, {0 K6 U
direction and 28 threads in the other direction (for any centimeter square 13 threads in one direction and, r* ^; ^ ?) R! Z3 {
11 threads in the other direction).
( p9 X/ j S. R9 o我们有40克的纱布，28×32。
) t! o: y/ q& c1 C4 @http://www.eychi.com/product/cc40.html$ y+ P. c8 i* x7 ~! ?! I
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发表于 2011-7-25 19:39
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