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China GB Standards List

 GB/T 6060.2-2006  
Roughness comparison specimens - ground, turned, bored, milled, shaped and planed

表面粗糙度比较样块 磨、车、镗、铣、插及刨加工表面
 GB 50366-2005  
Technical code for ground source heat pump system

地源热泵系统工程技术规范(2009年版)
 GB/T 4652-2003  
Testing method of loader for underground mining

地下矿用装岩机和装载机 试验方法

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