... 杆式泵 rod pump 杆式输送机 bar conveyor 杆栓 rockbolt ...
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...锚杆 ; 检测 中图分类号 : TD 355 + 19 文献标识码 : A 文章编号 : 1004 - 2660 (2004) 02 - 0012 - 06 [gap=672]Key words : Drawing force ; rockbolt ; detection coefficient , how mach of test and detection to be needed , when to ..