..............page:122-124
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..............page:88-92,107
Metal Tungsten & Cobalt Recycled from Disused Anvil by Niter Casting
tang qing-yun~1; wu yun-lan~2; duan dong-ping~3(1. department of chemistry and environmental engineering; hunan city university; yiyang 413049; china; 2.department of chemistry; xiangnan university; chenzhou 423000; china; 3.yiyang powder metallurgy works; yiyang 413000; china)
..............page:51-53,63
..............page:36-37,42
A New Algebraic Inequality
zhang zhi-hua~1; duan xiong-bin~2(1. zixing educational research section; chenzhou 423400; china; 2. no.3 middle school of zixing; chenzhou 423400; china)
..............page:23-24,29