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是这个纱布吗？
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, x- c8 R" _1 _- B7 c& Q41.1.28 Wherever cheesecloth is mentioned in connection with either a temperature test or an abnormal
: {: {9 C* e% f: s" ktest, the cloth is to be bleached cheese-cloth, running 14 – 15 yd2/lb (approximately 28 – 30 m2/kg), and! ]+ ]% m( s( L! t6 A* K
having what is known to the trade as a ²count of 32 ´ 28² – that is, for any inch square, 32 threads in one* z9 R" z4 o0 R8 j
direction and 28 threads in the other direction (for any centimeter square 13 threads in one direction and
, i' n- l# v/ m. M9 a- o6 V# F6 }11 threads in the other direction).
0 B* j3 A, d8 V& ]我们有40克的纱布，28×32。
/ K7 ]+ K0 }+ H9 y& t) H; ?, \http://www.eychi.com/product/cc40.html- Z* o' ~- K5 G1 q' o* e( B$ x
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发表于 2011-7-25 19:39
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